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FORD OBDII DTC

P1000 OBD Systems Readiness Test Not Complete

P1001 KOER Not Able to Complete, KOER Aborted

P1003 Transmission Range Sensor Circuit Malfunction.

P1005 Differential Pressure Feedback EGR (DPFE) Sensor Circuit Low Voltage Detected

P1008 Evaporative emission control system purge control valve circuit malfunction

P1039 Vehicle Speed Signal Missing Or Improper

P1051 Brake Switch Signal Missing Or Improper

P1071 (SCP) invalid or missing data for engine sensors

P1073 (SCP) invalid or missing data for engine coolant

P1100 Mass Air Flow Sensor Circuit Intermittent/Check of all OBDII Systems Not Complete

P1101 Mass Air Flow Sensor Out Of Self Test Range/KOER Not Able To Complete KOER Aborted

P1102 MAF Sensor In Range But Lower Than Expected

P1103 MAF Sensor In Range But Higher Than Expected

P1104 MAF Ground Malfunction

P1105 Dual Alternator Upper Fault

P1106 Dual Alternator Lower Fault

P1107 Dual Alternator Lower Circuit

P1108 Dual Alternator Lower Circuit

P1109 Intake Air Temperature B Circuit Intermittent

P1110 IAT Sensor (D/C) Open/Short

P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage

P1112 Intake Air Temperature Circuit Intermittent

P1113 IAT Sensor Open/Short

P1114 Intake Air Temperature B Circuit Low Input (Super/Turbo Charged engines)

P1115 Intake Air Temperature B Circuit High Input (Super/Turbo Charged engines)

P1116 Engine Coolant Temperature Sensor Out Of Self Test Range

P1117 Engine Coolant Temperature Sensor Circuit Intermittent

P1118 Manifold Air Temperature Circuit Low Input

P1119 Manifold Air Temperature Circuit High Input

P1120 Throttle Position Sensor A Out Of Range Low (Ratch too low)

P1121 Throttle Position Sensor A Inconsistent With Mass Air Flow Sensor

P1122 Pedal Position Sensor A Circuit Low Input

P1123 Pedal Position Sensor A Circuit High Input

P1124 Throttle Position Sensor A Out Of Self Test Range

P1125 Throttle Position Sensor A Intermittent

P1126 Throttle Position (Narrow Range) Sensor Circuit Malfunction

P1127 Exhaust Not Warm, Downstream O2 Sensor Not Tested

P1128 Upstream HO2S Sensors Swapped

P1129 Downstream HO2S Sensors Swapped

P1130 Lack Of HO2S11 Switches - Fuel Trim At Limit

P1131 Lack Of HO2S11 Switches - Sensor Indicates Lean

P1132 Lack Of HO2S11 Switches - Sensor Indicates Rich

P1133 Bank 1 Fuel Control Shifted Lean (FAOSC)

P1134 Bank 1 Fuel Control Shifted Rich (FAOSC)

P1135 Pedal Position Sensor A Circuit Intermittent

P1136 Fan Control Circuit Malfunction

P1137 Lack of HO2S12 Switches - Sensor Indicates Lean

P1138 Lack of HO2S12 Switches - Sensor Indicates Rich

P1139 Water in Fuel Indicator Circuit

P1140 Water in Fuel Condition

P1141 Fuel Restriction Indicator Circuit

P1142 Fuel Restriction Condition

P1143 Air Assist Control Valve Range/Performance

P1144 Air Assist Control Valve Circuit Malfunction

P1150 Lack of HO2S21 Switches - Fuel Trim At Limit

P1151 Lack of HO2S21 Switches - Sensor Indicates Lean

P1152 Lack of HO2S21 Switches - Sensor Indicates Rich

P1153 Bank 2 Fuel Control Shifted Lean (FAOSC)

P1154 Bank 2 Fuel Control Shifted Rich (FAOSC)

P1155 Alternative Fuel Control Module Has Activated the MIL

P1156 Fuel Select Switch Malfunction

P1157 Lack of HO2S22 Switches - Sensor Indicates Lean

P1158 Lack of HO2S22 Switches - Sensor Indicates Rich

P1159 Fuel Stepper Motor Malfunction

P1167 Invalid Test, throttle not depressed

P1168 Fuel Rail Pressure Sensor In Range But Low

P1169 Fuel Rail Pressure Sensor In Range But High

P1170 Engine Shut Off Solenoid

P1171 Rotor Sensor

P1172 Rotor Control

P1173 Rotor Calibration

P1174 Cam Sensor

P1175 Cam Control

P1176 Cam Calibration

P1177 Synchronization

P1178 Boltup Limits

P1180 Fuel Delivery System - Low

P1181 Fuel Delivery System - High

P1182 Fuel Shut Off Solenoid Malfunction

P1183 Engine Oil Temperature Sensor Circuit

P1184 Engine Oil Temperature Sensor Out Of Self Test Range

P1185 Fuel Pump Temperature Sensor High

P1186 Fuel Pump Temperature Sensor Low

P1187 Variant Selection

P1188 Calibration Memory

P1189 Pump Speed Signal

P1190 Calibration Resistor Out Of Range

P1191 Key Line Voltage

P1192 V External

P1193 EGR Driver Over Current

P1194 ECM/PCM A/D Converter

P1195 SCP HBCC Chip Failed to Initialize

P1196 Key Off Voltage High

P1197 Key Off Voltage Low

P1198 Pump Rotor Control Underfueling

P1199 Fuel Level Input Circuit Low

P1200 Injector Control Circuit

P1201 Injector Circuit Open / Shorted - Cylinder #1

P1202 Injector Circuit Open / Shorted - Cylinder #2

P1203 Injector Circuit Open / Shorted - Cylinder #3

P1204 Injector Circuit Open / Shorted - Cylinder #4

P1205 Injector Circuit Open / Shorted - Cylinder #5

P1206 Injector Circuit Open / Shorted - Cylinder #6

P1209 Injector Control Pressure Peak Delta Test Fault

P1210 Injector Control Pressure Above Expected Level

P1211 Injector Control Pressure Above/Below Desired

P1212 Injector Control Pressure Not At Expected Level

P1213 Start Injector Circuit Malfunction

P1214 Pedal Position Sensor B Circuit Intermittent

P1215 Pedal Position Sensor C Circuit Low Input

P1216 Pedal Position Sensor C Circuit High Input

P1217 Pedal Position Sensor C Circuit Intermittent

P1218 CID High

P1219 CID Low

P1220 Series Throttle Control System

P1221 Traction Control System

P1222 Traction Control Output Circuit

P1223 Pedal Position Sensor B Circuit High Input

P1224 Throttle Position Sensor B Out Of Self Test Range

P1225 Needle Lift Sensor Malfunction

P1226 Control Sleeve Sensor Malfunction

P1227 Wastegate Failed Closed (Over pressure)

P1228 Wastegate Failed Open (Under pressure)

P1229 Charge Air Cooler Pump Driver

P1230 Fuel Pump Low Speed Malfunction (VLCM)

P1231 Fuel Pump Secondary Circuit Low, High Speed (VLCM)

P1232 Fuel Pump Speed Primary Circuit (Two speed fuel pump)

P1233 Fuel Pump Driver Module Disabled or Off Line (Fuel Pump Driver Module)

P1234 Fuel Pump Driver Module Disabled or Off Line (Fuel Pump Driver Module)

P1235 Fuel Pump Control Out Of Range (Fuel Pump Driver Module/VLCM)

P1236 Fuel Pump Control Out Of Range (Fuel Pump Driver Module)

P1237 Fuel Pump Secondary Circuit (Fuel Pump Driver Module)

P1238 Fuel Pump Secondary Circuit (Fuel Pump Driver Module)

P1239 Speed Fuel Pump Positive Feed

P1240 Sensor Power Supply Malfunction

P1241 Sensor Power Supply Low Input

P1242 Sensor Power Supply High Input

P1243 Second Fuel Pump Fault or Ground Fault

P1244 Alternator Load High Input

P1245 Alternator Load Low Input

P1246 Alternator Load Input

P1247 Turbo Boost Pressure Low

P1248 Turbo Boost Pressure Not Detected

P1249 Wastegate Control Valve Performance

P1250 PRC Solenoid Circuit Malfunction

P1251 Air Mixture Solenoid Circuit Malfunction

P1252 Pedal Correlation PDS1 and LPDS High

P1253 Pedal Correlation PDS1 and LPDS Low

P1254 Pedal Correlation PDS2 and LPDS High

P1255 Pedal Correlation PDS2 and LPDS Low

P1256 Pedal Correlation PDS1 and HPDS

P1257 Pedal Correlation PDS2 and HPDS

P1258 Pedal Correlation PDS1 and PDS2

P1259 Immobilizer to PCM Signal Error

P1260 Theft Detected, Vehicle Immobilized

P1261 Cylinder #1 High To Low Side Short

P1262 Cylinder #2 High To Low Side Short

P1263 Cylinder #3 High To Low Side Short

P1264 Cylinder #4 High To Low Side Short

P1265 Cylinder #5 High To Low Side Short

P1266 Cylinder #6 High To Low Side Short

P1267 Cylinder #7 High To Low Side Short

P1268 Cylinder #8 High To Low Side Short

P1269 Immobilizer Code Not Programmed

P1270 Engine RPM or Vehicle Speed Limiter Reached

P1271 Cylinder #1 High To Low Side Open

P1272 Cylinder #2 High To Low Side Open

P1273 Cylinder #3 High To Low Side Open

P1274 Cylinder #4 High To Low Side Open

P1275 Cylinder #5 High To Low Side Open

P1276 Cylinder #6 High To Low Side Open

P1277 Cylinder #7 High To Low Side Open

P1278 Cylinder #8 High To Low Side Open

P1280 Injector Control Pressure Out Of Range Low

P1281 Injector Control Pressure Out Of Range High

P1282 Excessive Injector Control Pressure

P1283 Injector Pressure Regulator Circuit

P1284 Aborted KOER - Injector Control Pressure Failure

P1285 Cylinder Head Overtemperature Condition

P1286 Fuel Pulsewidth In Range But Lower Than Expected

P1287 Fuel Pulsewidth In Range But Higher Than Expected

P1288 Cylinder Head Temperature Sensor Out Of Self Test Range

P1289 Cylinder Head Temperature Sensor Circuit High Input

P1290 Cylinder Head Temperature Sensor Circuit Low Input

P1291 Injector High Side Short To GND Or VBATT - Bank 1

P1292 Injector High Side Short To GND Or VBATT - Bank 2

P1293 Injector High Side Open - Bank 1

P1294 Injector High Side Open - Bank 2

P1295 Injector Multiple Faults - Bank 1

P1296 Injector Multiple Faults - Bank 2

P1297 Injector High Side Switches Shorted Together

P1298 Injector Driver Module Failure

P1299 Cylinder Head Overtemperature Protection Active

P1300 Boost Calibration Fault

P1301 Boost Calibration High

P1302 Boost Calibration Low

P1303 Exhaust Gas Recirculation Calibration Fault

P1304 Exhaust Gas Recirculation Calibration High

P1305 Exhaust Gas Recirculation Calibration Low

P1306 Kickdown Relay Pull-in Circuit

P1307 Kickdown Relay Hold Circuit

P1308 A/C Clutch Circuit Fault

P1309 Misfire Monitor AICE Chip Fault, Misfire Monitor Disabled

P1310 Ionization Misfire Detection Module Fault

P1311 Ionization Misfire Detection Module Communication Fault

P1313 Misfire Rate Catalyst Damage Fault - Bank 1

P1314 Misfire Rate Catalyst Damage Fault - Bank 2

P1315 Persistent Misfire

P1316 IDM Codes Detected

P1317 Injector Circuit / IDM Codes Not Updated

P1336 Crank / Cam Sensor Range / Performance

P1340 Camshaft Position Sensor B Circuit

P1341 Camshaft Position Sensor B Range / Performance

P1345 SGC (Cam Position) Sensor Circuit Malfunction/ Crankshaft Position - Camshaft

Position Correlation

P1346 Fuel Level Sensor B Circuit Malfunction

P1347 Fuel Level Sensor B Range / Performance

P1348 Fuel Level Sensor B Circuit Low

P1349 Fuel Level Sensor B Circuit High

P1350 Fuel Level Sensor B Intermittent/Bypass Line Monitor

P1351 Ignition Diagnostic Monitor Input Circuit

P1352 Ignition Coil A Primary Circuit

P1353 Ignition Coil B Primary Circuit

P1354 Ignition Coil C Primary Circuit

P1355 Ignition Coil D Primary Circuit

P1356 Ignition Diagnostic Monitor Indicates Engine Not Turning

P1357 Ignition Diagnostic Monitor Pulsewidth Not Defined

P1358 Ignition Diagnostic Monitor Signal Out Of Self Test Range (no CPU OK)

P1359 Spark Output Circuit

P1360 Ignition Coil A Secondary Circuit

P1361 Ignition Coil B Secondary Circuit

P1362 Ignition Coil C Secondary Circuit

P1363 Ignition Coil D Secondary Circuit

P1364 Ignition Coil Primary Circuit

P1365 Ignition Coil Secondary Circuit

P1366 Ignition Spare

P1367 Ignition Spare

P1368 Ignition Spare

P1369 Engine Temperature Light Circuit

P1370 Insufficient RMP Increase During Spark Test

P1371 Ignition Coil - Cylinder 1 - Early Activation Fault

P1372 Ignition Coil - Cylinder 2 - Early Activation Fault

P1373 Ignition Coil - Cylinder 3 - Early Activation Fault

P1374 Crankshaft Position (CKP)/Ignition Coil - Cylinder 4 - Early Activation Fault

P1375 Ignition Coil - Cylinder 5 - Early Activation Fault

P1376 Ignition Coil - Cylinder 6 - Early Activation Fault

P1380 Camshaft Position Actuator Circuit (Bank 1)

P1381 Camshaft Position Timing Over Advanced (Bank 1)

P1382 Variable Cam Timing Solenoid #1 Circuit Malfunction

P1383 Camshaft Position Timing Over Retarded (Bank 1)

P1384 VVT Solenoid A Malfunction

P1385 Camshaft Position Actuator Circuit (Bank 2)

P1386 Camshaft Position Timing Over Advanced (Bank 2)

P1387 Variable Cam Timing Solenoid #2 Circuit Malfunction

P1388 Camshaft Position Timing Over Retarded (Bank 2)

P1389 Glow Plug Circuit High Side Low Input

P1390 Octane Adjust Service Pin In Use/Circuit Open

P1391 Glow Plug Circuit Low Input (Bank #1)

P1392 Glow Plug Circuit High Input (Bank #1)

P1393 Glow Plug Circuit Low Input (Bank #2)

P1394 Glow Plug Circuit High Input (Bank #2)

P1395 Glow Plug Monitor Fault (Bank #1)

P1396 Glow Plug Monitor Fault (Bank #2)

P1397 System Voltage Out Of Self Test Range

P1398 VVT Solenoid B Circuit High Input

P1399 Glow Plug Circuit High Side, High Input

P1400 Differential Pressure Feedback EGR Circuit Low Input

P1401 Differential Pressure Feedback EGR Circuit High Input

P1402 Exhaust Gas Recirculation Metering Orifice Restricted

P1403 Differential Pressure Feedback Sensor Hoses Reversed

P1404 EGR Temperature Sensor Circuit

P1405 Differential Pressure Feedback Sensor Upstream Hose Off Or Plugged

P1406 Differential Pressure Feedback Sensor Downstream Hose Off Or Plugged

P1407 Exhaust Gas Recirculation No Flow Detected

P1408 Exhaust Gas Recirculation Flow Out Of Self Test Range

P1409 EGR Vacuum Regulator Solenoid Circuit

P1410 Auxiliary Air Cleaner Inlet Control Circuit

P1411 Secondary Air Injection Incorrect Downstream Flow Detected

P1413 Secondary Air Injection Monitor Circuit Low Input

P1414 Secondary Air Injection Monitor Circuit High Input

P1415 Air Pump Circuit Malfunction/ (AIR) System Bank 1

P1416 Port Air Circuit Malfunction/ (AIR) System Bank 2

P1417 Port Air Relief Circuit Malfunction

P1418 Split Air #1 Circuit Malfunction

P1419 Split Air #2 Circuit Malfunction

P1420 Catalyst Temperature Sensor Failure

P1421 Catalyst Damage

P1422 EGI Temperature Sensor Failure

P1423 EGI Functionality Test Failed

P1424 EGI Glow Plug Primary Failure

P1425 EGI Glow Plug Secondary Failure

P1426 EGI Mini - MAF Failed Out Of Range

P1427 EGI Mini - MAF Failed Short Circuit

P1428 EGI Mini - MAF Failed Open Circuit

P1429 Electric Air Pump Primary Failure

P1430 Electric Air Pump Secondary Failure

P1431 Misfire Monitor Disabled, Unable to Learn Trigger Wheel Profile

P1433 A/C Refrigerant Temperature Circuit Low

P1434 A/C Refrigerant Temperature Circuit High

P1435 A/C Refrigerant Temperature Circuit Range/Performance

P1436 A/C Evaporator Air Temperature Circuit Low

P1437 A/C Evaporator Air Temperature Circuit High

P1438 A/C Evaporator Air Temperature Circuit Range/Performance

P1439 Floor Temperature Switch Circuit Malfunction

P1440 Purge Valve Stuck Open

P1441 Evaporative Emission (EVAP) System Flow During Non-Purge Chevrolet Only

P1442 Evaporative Emission Control System Control Leak Detected

P1443 Evaporative Emission Control System Control Valve

P1444 Purge Flow Sensor Circuit Low Input

P1445 Purge Flow Sensor Circuit High Input

P1446 Evaporative Vac Solenoid Circuit Malfunction

P1447 ELC System Closure Valve Flow Fault

P1448 ELC System 2 Fault

P1449 Evaporative Check Solenoid Circuit Malfunction

P1450 Unable to Bleed Up Fuel Tank Vacuum

P1451 Evaporative Emission Control System Vent Control Circuit

P1452 Unable to Bleed Up Fuel Tank Vacuum

P1453 Fuel Tank Pressure Relief Valve Malfunction

P1454 Evaporative System Vacuum Test Malfunction

P1455 Evaporative Emission Control System Control Leak Detected (gross leak/no flow)

P1456 Fuel Tank Temperature Sensor Circuit Malfunction

P1457 Unable to Pull Fuel Tank Vacuum

P1460 Wide Open Throttle A/C Cutout Circuit

P1461 A/C Pressure Sensor Circuit High Input

P1462 A/C Pressure Sensor Circuit Low Input

P1463 A/C Pressure Sensor Insufficient Pressure Change

P1464 A/C Demand Out Of Self Test Range

P1465 A/C Relay Circuit

P1466 A/C Refrigerant Temperature Sensor Circuit

P1467 A/C Compressor Temperature Sensor Malfunction

P1468 SSPOD Open Circuit or Closed Circuit Fault

P1469 Rapid A/C Cycling

P1470 A/C Cycling Period Too Short

P1471 Electrodrive Fan 1 Operational Failure (Driver Side)

P1472 Electrodrive Fan 2 Operational Failure (Passenger Side)

P1473 Fan Circuit Open (VLCM)

P1474 Fan Control Primary Circuit

P1475 Fan Relay (Low) Circuit Malfunction

P1476 Fan Relay (High) Circuit Malfunction

P1477 Additional Fan Relay Circuit Malfunction

P1478 Cooling Fan Driver Fault

P1479 High Fan Control Primary Circuit

P1480 Fan Secondary Low With Low Fan On

P1481 Fan Secondary Low With High Fan On

P1482 SCP

P1483 Brake Pedal Input Short To Battery

P1484 Fan Driver Circuit Open To Power Ground (VLCM)

P1485 Brake Pedal Input Short To Battery

P1486 EGRA Circuit Malfunction

P1487 EGRCHK Solenoid Circuit Malfunction

P1490 Secondary Air Relief Solenoid Circuit Malfunction

P1491 Secondary Switch Solenoid Circuit Malfunction

P1492 APLSOL Solenoid Circuit Malfunction

P1493 RCNT Solenoid Circuit Malfunction

P1494 SPCUT Solenoid Circuit Malfunction

P1495 TCSPL Solenoid Circuit Malfunction

P1500 Vehicle Speed Sensor

P1501 Vehicle Speed Sensor Out Of Self Test Range

P1502 Vehicle Speed Sensor Intermittent

P1503 Auxillary Speed Sensor Fault

P1504 Idle Air Control Circuit

P1505 Idle Air Control System At Adaptive Clip

P1506 Idle Air Control Overspeed Error

P1507 Idle Air Control Underspeed Error

P1508 Idle Control System Circuit Open

P1509 Idle Control System Circuit Shorted

P1510 Idle Signal Circuit Malfunction

P1511 Idle Switch (Electric Control Throttle) Circuit Malfunction

P1512 Intake Manifold Runner Control Stuck Closed (Bank 1)

P1513 Intake Manifold Runner Control Stuck Closed (Bank 2)

P1514 High Load Neutral/Drive Fault

P1515 Electric Current Circuit Malfunction

P1516 Intake Manifold Runner Control Input Error (Bank 1)

P1517 Intake Manifold Runner Control Input Error (Bank 2)

P1518 Intake Manifold Runner Control Stuck Open (Bank 1)

P1519 Intake Manifold Runner Control Stuck Closed (Bank 2)

P1520 Intake Manifold Runner Control Circuit

P1521 Variable Intake Solenoid #1 Circuit Malfunction

P1522 Variable Intake Solenoid #2 Circuit Malfunction

P1523 IVC Solenoid Circuit Malfunction

P1524 Variable Intake Solenoid System

P1525 Air Bypass Valve System

P1526 Air Bypass System

P1527 Accelerate Warmup Solenoid Circuit Malfunction

P1528 Subsidiary Throttle Valve Solenoid Circuit Malfunction

P1529 SCAIR Solenoid Circuit Malfunction

P1530 A/C Clutch Circuit Open (VLCM)

P1531 Invalid Test - Accelerator Pedal Movement

P1532 Intake Manifold Communication Control Circuit (Bank 2)

P1533 Air Assisted Injector Circuit

P1534 Restraint Deployment Indicator Circuit

P1535 Blower Fan Speed Circuit Range/Performance

P1536 Parking Brake Switch Circuit Failure

P1537 Intake Manifold Runner Control Stuck Open (Bank 1)

P1538 Intake Manifold Runner Control Stuck Open (Bank 2)

P1539 A/C Clutch Circuit Overcurrent/Short (VLCM)

P1540 Air Bypass Valve Circuit Malfunction

P1549 Intake Manifold Communication Control Circuit (Bank 1)

P1550 Power Steering Pressure Sensor Out Of Self Test Range

P1565 Speed Control Command Switch Out Of Range High

P1566 Speed Control Command Switch Out Of Range Low

P1567 Speed Control Output Circuit

P1568 Speed Control Unable To Hold Speed

P1571 Brake Switch Malfunction

P1572 Brake Pedal Switch Circuit

P1573 Throttle Position Not Available

P1574 Throttle Position Sensor Outputs Disagree

P1575 Pedal Position Out Of Self Test Range

P1576 Pedal Position Not Available

P1577 Pedal Position Sensor Outputs Disagree

P1578 ETC Power Less Than Demand

P1579 ETC In Power Limiting Mode

P1580 Electronic Throttle Monitor PCM Override

P1581 Electronic Throttle Monitor Malfunction

P1582 Electronic Throttle Monitor Data Available

P1583 Electronic Throttle Monitor Cruise Disablement

P1584 Throttle Control Detected ETB Malfunction

P1585 Throttle Control Malfunction

P1586 Electronic Throttle To PCM Communication Error

P1587 Throttle Control Modulated Command Malfunction

P1588 Throttle Control Detected Loss Of Return Spring

P1589 Throttle Control Unable To Control To Desired Throttle Angle

P1600 Loss of KAM Power; Open Circuit

P1601 ECM/TCM Serial Communication Error

P1602 Immobilizer/ECM Communication Error

P1603 EEPROM Malfunction

P1604 Code Word Unregestered

P1605 Keep Alive Memory Test Failure

P1606 ECM Control Relay O/P Circuit Malfunction

P1607 MIL O/P Circuit Malfunction

P1608 Internal ECM Malfunction

P1609 Diagnostic Lamp Driver Fault

P1610 SBDS Interactive Codes

P1611 SBDS Interactive Codes

P1612 SBDS Interactive Codes

P1613 SBDS Interactive Codes

P1614 SBDS Interactive Codes

P1615 SBDS Interactive Codes

P1616 SBDS Interactive Codes

P1617 SBDS Interactive Codes

P1618 SBDS Interactive Codes

P1619 SBDS Interactive Codes

P1620 SBDS Interactive Codes

P1621 Control Module Long Term Memory Performance/ Immobilizer Code Words Do Not Match

P1622 Immobilizer ID Does Not Match

P1623 Immobilizer Code Word/ID Number Write Failure

P1624 Anti Theft System

P1625 Fan Driver Circuit Open to Power B+ (VLCM)

P1626 A/C Circuit Open to Power B+ (VLCM)

P1627 Module Supply Voltage Out Of Range

P1628 Module Ignition Supply Input Malfunction

P1629 Internal Voltage Regulator Malfunction

P1630 Internal Vref Malfunction

P1631 Theft Deterrent Start Enable Signal Not Correct/ Main Relay Malfunction (Power Hold)

P1632 Smart Alternator Faults Sensor/Circuit Malfunction

P1633 Keep Alive Power Voltage Too Low

P1634 Data Output Link Circuit Failure

P1635 Tire/Axle Out of Acceptable Range

P1636 Inductive Signature Chip Communication Error

P1637 Can Link ECM/ABSCM Circuit / Network Malfunction

P1638 Can Link ECM/INSTM Circuit / Network Malfunction

P1639 Vehicle ID Block Corrupted, Not Programmed

P1640 Powertrain DTCs Available In Another Control Module (Ref. PID 0946)

P1641 Fuel Pump Primary Circuit

P1642 CAN Link Circuit

P1643 CAN Link ECM/TCM Circuit/Network

P1644 Fuel Pump Speed Control Circuit

P1645 Fuel Pump Resistor Switch Circuit Malfunction

P1650 Power Steering Pressure Switch Out Of Self Test Range

P1651 Power Steering Pressure Switch Input

P1652 IAC Monitor Disabled by PSP Switch Failed On

P1653 Power Steering Output Circuit Malfunction

P1654 Recirculation Override Circuit Malfunction

P1655 Starter Disable Circuit Malfunction

P1656 CAN Link PCM/PCM Circuit Network

P1657 CAN Link Chip Malfunction

P1660 Output Circuit Check Signal High

P1661 Output Circuit Check Signal Low

P1662 IDM_EN Circuit Failure

P1663 Fuel Demand Command Signal Circuit Malfunction

P1667 CI Circuit Malfunction

P1668 PCM - IDM Communications Error

P1670 Electronic Feedback Signal Not Detected

P1680 Metering Oil Pump Malfunction

P1681 Metering Oil Pump Malfunction

P1682 Metering Oil Pump Malfunction

P1683 Metering Oil Pump Temperature Sensor Circuit Malfunction

P1684 Metering Oil Pump Position Sensor Circuit Malfunction

P1685 Metering Oil Pump Stepping Motor Circuit Malfunction

P1686 Metering Oil Pump Stepping Motor Circuit Malfunction

P1687 Metering Oil Pump Stepping Motor Circuit Malfunction

P1688 Metering Oil Pump Stepping Motor Circuit Malfunction

P1689 Oil Pressure Control Solenoid Circuit Malfunction

P1690 Wastegate Solenoid Circuit Malfunction

P1691 Turbo Pressure Control Solenoid Circuit Malfunction

P1692 Turbo Control Solenoid Circuit Malfunction

P1693 Turbo Charge Control Circuit Malfunction

P1694 Turbo Charge Relief Circuit Malfunction

P1700 Transmission Indeterminate Failure (Failed to Neutral)

P1701 Reverse Engagement Error

P1702 Transmission Range Sensor Circuit Intermittent

P1703 Brake Switch Out Of Self Test Range

P1704 Transmission Range Circuit Not Indicating Park/Neutral During Self Test

P1705 Transmission Range Circuit Not Indicating Park/Neutral During Self Test

P1706 High Vehicle Speed Observed in Park

P1707 Transfer Case Neutral Indicator Hard Fault Present

P1708 Clutch Switch Circuit Malfunction

P1709 Park Neutral Position Switch Out Of Self Test Range

P1710 Spare

P1711 Transmission Fluid Temperature Sensor Out Of Self Test Range

P1712 Transmission Torque Reduction Request Signal

P1713 Transmission Fluid Temperature Sensor In Range Failure (<50 deg F)

P1714 Shift Solenoid A Inductive Signature

P1715 Shift Solenoid B Inductive Signature

P1716 Shift Solenoid C Inductive Signature

P1717 Shift Solenoid D Inductive Signature

P1718 Transmission Fluid Temperature Sensor In Range Failure (>250 deg F)

P1719 Spare

P1720 Vehicle Speed (Meter) Circuit Malfunction

P1721 Gear 1 Incorrect Ratio

P1722 Gear 2 Incorrect Ratio

P1723 Gear 3 incorrect Ratio

P1724 Gear 4 Incorrect Ratio

P1725 Insufficient Engine Speed Increase During Self Test

P1726 Insufficient Engine Speed Decrease During Self Test

P1727 Coast Clutch Solenoid Inductive Signature

P1728 Transmission Slip

P1729 4x4L Switch

P1730 Gear Control Malfunction 2,3,5

P1731 1-2 Shift Malfunction

P1732 2-3 Shift Malfunction

P1733 3-4 Shift Malfunction

P1734 Gear Control Malfunction

P1735 First Gear Switch Circuit Malfunction

P1736 Second Gear Switch Circuit Malfunction

P1737 Lockup Solenoid System

P1738 Shift Time Error

P1739 Slip Solenoid System

P1740 Torque Converter Clutch Solenoid Inductive Signature

P1741 Torque Converter Clutch Solenoid Control Error

P1742 Torque Converter Clutch Solenoid Circuit Failed On

P1743 Torque Converter Clutch Solenoid Circuit Failed On

P1744 Torque Converter Clutch Solenoid Circuit Performance

P1745 Line Pressure Solenoid System

P1746 Pressure Control Solenoid A Open Circuit

P1747 Pressure Control Solenoid A Short Circuit

P1748 EPC Malfunction

P1749 Pressure Control Solenoid A Failed Low

P1751 Shift Solenoid A Performance

P1754 Coast Clutch Solenoid Circuit

P1755 Intermediate Speed Sensor (ISS) Malfunction

P1756 Shift Solenoid B Performance

P1760 Pressure Control Solenoid A Short Circuit Intermittent

P1761 Shift Solenoid C Performance

P1762 Overdrive Band Failed Off

P1765 Timing Solenoid Circuit Malfunction

P1766 Shift Solenoid D Performance

P1767 Torque Converter Clutch Circuit

P1768 Performance/Normal/Winter Mode Input

P1769 AG4 Transmission Torque Modulation Fault

P1770 Clutch Solenoid Circuit

P1775 Transmission System MIL Fault

P1776 Ignition Retard Request Duration Fault

P1777 Ignition Retard Request Circuit Fault

P1778 Transmission Reverse I/P Circuit Malfunction

P1779 TCIL Circuit Malfunction

P1780 Transmission Control Switch (O/D Cancel) Circuit Out Of Self Test Range

P1781 4X4L Circuit Out Of Self Test Range

P1782 Performance/Economy Switch Circuit Out Of Self Test Range

P1783 Transmission Overtemperature Condition

P1784 Transmission Mechanical Failure - First and Reverse

P1785 Transmission Mechanical Failure - First and Second

P1786 3-2 Downshift Error

P1787 2-1 Downshift Error

P1788 Pressure Control Solenoid B Open Circuit

P1789 Pressure Control Solenoid B Short Circuit

P1790 TP (Mechanical) Circuit Malfunction

P1791 TP (Electric) Circuit Malfunction

P1792 Barometer Pressure Circuit Malfunction

P1793 Intake Air Volume Circuit Malfunction

P1794 Battery Voltage Circuit Malfunction

P1795 Idle Switch Circuit Malfunction

P1796 Kick Down Switch Circuit Malfunction

P1797 Neutral Switch Circuit Malfunction

P1798 Coolant Temperature Circuit Malfunction

P1799 Hold Switch Circuit Malfunction

P1800 Transmission Clutch Interlock Safety Switch Circuit Failure

P1801 Transmission Clutch Interlock Safety Switch Open Circuit

P1802 Transmission Clutch Interlock Safety Switch Short Circuit To Battery

P1803 Transmission Clutch Interlock Safety Switch Short Circuit To Ground

P1804 4-Wheel Drive High Indicator Circuit Open or Shorted To Ground

P1805 Transmission 4-Wheel Drive High Indicator Open Circuit

P1806 4-Wheel Drive High Indicator Short To Battery

P1807 Transmission 4-Wheel Drive High Indicator Short Circuit To Ground

P1808 4-Wheel Drive Low Indicator Circuit Open or Short To Ground

P1809 Transmission 4-Wheel Drive Low Indicator Open Circuit

P1810 4-Wheel Drive Low Indicator Short To Battery

P1811 Transmission 4-Wheel Drive Low Indicator Short Circuit To Ground

P1812 4-Wheel Drive Mode Select Switch Circuit Open

P1813 Transmission 4-Wheel Drive Mode Select Open Circuit

P1814 Transmission 4-Wheel Drive Mode Select Short Circuit To Battery

P1815 4-Wheel Drive Mode Select Switch Circuit Short To Ground

P1816 Transmission Neutral Safety Switch Circuit Failure

P1817 Transmission Neutral Safety Switch Open Circuit

P1818 Transmission Neutral Safety Switch Short Circuit To Battery

P1819 Neutral Safety Switch Input Short To Ground

P1820 Transfer Case LO To HI Shift Relay Circuit Open Or Short To Ground

P1821 Transmission Transfer Case Clockwise Shift Relay Coil Open Circuit

P1822 Transfer Case LO To HI Shift Relay Coil Short To Battery

P1823 Transmission Transfer Case Clockwise Shift Relay Coil Short Circuit To Ground

P1824 4-Wheel Drive Electric Clutch Relay Open Or Short To Ground

P1825 Transmission 4-Wheel Drive Clutch Relay Open Circuit

P1826 4-Wheel Drive Electric Clutch Relay Short To Battery

P1827 Transmission 4-Wheel Drive Low Clutch Relay Circuit To Ground

P1828 Transfer Case HI To LO Shift Relay Coil Circuit Open Or Short To Ground

P1829 Transmission Transfer Case Counter Clockwise Shift Relay Coil Open Circuit

P1830 Transfer Case HI To LO Shift Relay Coil Circuit Short To Battery

P1831 Transmission Transfer Case Counter Clockwise Shift Relay Coil Short Circuit To Ground

P1832 Transfer Case 4-Wheel Drive Solenoid Circuit Open or Short To Ground

P1833 Transmission Transfer Case Differential Lock-Up Solenoid Open Circuit

P1834 Transfer Case 4-Wheel Drive Solenoid Circuit Short To Battery

P1835 Transmission Transfer Case Differential Lock-Up Solenoid Short Circuit To Ground

P1836 Transmission Transfer Case Front Shaft Speed Sensor Circuit Failure

P1837 Transmission Transfer Case Rear Shaft Speed Sensor Circuit Failure

P1838 No Shift Motor Movement Detected

P1839 Transmission Transfer Case Shift Motor Open Circuit

P1840 Transmission Transfer Case Shift Motor Short Circuit To Battery

P1841 Transmission Transfer Case Shift Motor Short Circuit To Ground

P1842 Transmission Transfer Case Differential Lock-Up Feedback Switch Circuit Failure

P1843 Transmission Transfer Case Differential Lock-Up Feedback Switch Open Circuit

P1844 Transmission Transfer Case Differential Lock-Up Feedback Switch Short Circuit To Battery

P1845 Transmission Transfer Case Differential Lock-Up Feedback Switch Short Circuit To Ground

P1846 Transfer Case Contact Plate 'A'Circuit Open

P1847 Transmission Transfer Case Contact Plate 'A' Open Circuit

P1848 Transmission Transfer Case Contact Plate 'A' Short Circuit To Battery

P1849 Transmission Transfer Case Contact Plate 'A' Short Circuit To Ground

P1850 Transmission Transfer Case Contact Plate 'B' Circuit Failure

P1851 Transmission Transfer Case Contact Plate 'B' Open Circuit

P1852 Transmission Transfer Case Contact Plate 'B' Short Circuit To Battery

P1853 Transmission Transfer Case Contact Plate 'B' Short Circuit To Ground

P1854 Transmission Transfer Case Contact Plate 'C' Circuit Failure

P1855 Transmission Transfer Case Contact Plate 'C' Open Circuit

P1856 Transmission Transfer Case Contact Plate 'C' Short Circuit To Battery

P1857 Transmission Transfer Case Contact Plate 'C' Short Circuit To Ground

P1858 Transmission Transfer Case Contact Plate 'D' Circuit Failure

P1859 Transmission Transfer Case Contact Plate 'D' Open Circuit

P1860 TCC PWM Solenoid Circuit Electrical/ Transmission Transfer Case Contact Plate 'D' Short Circuit To Battery

P1861 Transmission Transfer Case Contact Plate 'D' Short Circuit To Ground

P1862 Transmission Transfer Case Contact Plate Power Circuit Failure

P1863 Transmission Transfer Case Contact Plate Power Open Circuit

P1864 Transmission Transfer Case Contact Plate Power Short To Battery

P1865 Transmission Transfer Case Contact Plate Power Short To Ground

P1866 Transmission Transfer Case System Concern - Servicing Required

P1867 Transmission Transfer Case Contact Plate General Circuit Failure

P1868 Transmission Automatic 4-Wheel Drive Indicator (Lamp) Circuit Failure

P1869 Transmission Automatic 4-Wheel Drive Indicator (Lamp) Circuit Short To Battery

P1870 Transmission Component Slipping/ Transmission Mechanical Transfer Case 4x4 Switch Circuit Failure

P1871 Transmission Mechanical Transfer Case 4x4 Switch Circuit Short To Battery

P1872 Transmission Mechanical 4-Wheel Drive Axle Lock Lamp Circuit Failure

P1873 Transmission Mechanical 4-Wheel Drive Axle Lock Lamp Circuit Short To Battery

P1874 Transmission Automatic Hall Effect Sensor Power Circuit Failure

P1875 Transmission Automatic Hall Effect Sensor Power Circuit Short To Battery / 4WD Low Switch Circuit Electrical

P1876 Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Failure

P1877 Transmission Transfer Case 2-Wheel Drive Solenoid Circuit Short To Battery

P1878 Transmission Transfer Case Disengaged Solenoid Circuit Failure

P1879 Transmission Transfer Case Disengaged Solenoid Open Circuit

P1880 Transmission Transfer Case Disengaged Solenoid Short to Battery

P1881 Engine Coolant Level Switch Circuit Failure, GEM

P1882 Engine Coolant Level Switch Circuit Short to Ground

P1883 Engine Coolant Level Switch Circuit Failure, GEM

P1884 Engine Coolant Level Lamp Circuit Short to Ground

P1885 Transmission Transfer Case Disengaged Solenoid Short to Ground

P1886 4X4 Initialization Failure

P1890 Transmission 4WD Mode Select Return Input Circuit Failure

P1891 Transmission Transfer Case Contact Plate Ground Return Open Circuit

P1900 Output Shaft Speed Sensor Circuit Intermittent

P1901 Turbine Shaft Speed Sensor Circuit Intermittent

P1902 Pressure Control Solenoid B Intermittent Short

P1903 Pressure Control Solenoid C Short Circuit

P1904 Pressure Control Solenoid C Open Circuit

P1905 Pressure Control Solenoid C Intermittent Short

P1906 Kickdown Pull Relay Open or Short Circuit to Ground

P1907 Kickdown Hold Relay Open or Short Circuit to Ground

P1908 Transmission Pressure Circuit Solenoid Open or Short to Ground

P1909 Trans Temp Sensor Circuit Open or Shorted to Pwr or Gnd

P1910 VFS A Pressure Output Failed Low

P1911 VFS B Pressure Output Failed Low

P1912 VFS C Pressure Output Failed Low

P1913 Pressure Switch A Circuit Malfunction

P1914 Manually Shifted Automatic (MSA) Sw Circuit Malf

P1915 Reverse Switch Circuit Malfunction

P1916 High Clutch Drum Speed Sensor Malfunction

P1917 High Clutch Drum Speed Sensor Intermittent

P1918 Transmission Range Display Circuit Malfunction

Ford code explanations

 DTC                   Description           Possible Cause        Diagnosis
____________________________________________________________________________________________________

: P1000 - Monitor        : The on board           : *  Vehicle is new from : The DTC does not need  :
: Testing Not Complete   : diagnostic II (OBD II) :    the factory         : to be cleared from the :
:                        : monitors are performed : *  Battery or PCM had  : PCM except to pass an  :
:                        : during the OBD II      :    recently been       : inspection/maintenance :
:                        : Drive Cycle. The DTC   :    disconnected        : test.                  :
:                        : will be stored in      : *  An OBD II monitor   :
:                        : continuous memory if   :    failure had         :
:                        : any of the OBD II      :    occurred before     :
:                        : monitors do not        :    completion of an    :
:                        : complete.              :    OBD II drive cycle  :
:                        :                        : *  PCM DTCs have       :
:                        :                        :    recently been       :
:                        :                        :    cleared with a scan :
:                        :                        :    tool                :
:                        :                        : *  PTO circuit is      :
:                        :                        :    shorted to VPWR or  :
:                        :                        :    B+ or PTO is on     :
:                        :                        :    during testing      :
____________________________________________________________________________________________________

: P1001 - KOER Not Able  : This Non-MIL           : *  Incorrect Self-Test : Rerun Self-Test        :
: To Complete, KOER      : (Malfunction Indicator :    Procedure.          : following QT1 in       :
: Aborted                : Lamp) code will be set : *  Unexpected response : Section 3, Symptom     :
:                        : when Key On Engine     :    from Self-Test      : Charts, STEP 1: PCM    :
:                        : Running (KOER) Self    :    monitors.           : Quick Test.            :
:                        : -Test does not         : *  rpm out of          :
:                        : complete in the time   :    specification.      :
:                        : intended.              :
____________________________________________________________________________________________________

: P1100 - Mass Air Flow  : The MAF sensor circuit : *  Poor continuity     : While accessing the    :
: (MAF) Sensor           : is monitored by the    :    through the MAF     : MAF V PID on the scan  :
: Intermittent           : PCM for sudden voltage :    sensor connectors   : tool, lightly tap on   :
:                        : (or air flow) input    : *  Poor continuity     : the MAF sensor or      :
:                        : change through the     :    through the MAF     : wiggle the MAF sensor  :
:                        : comprehensive          :    sensor harness      : connector and harness. :
:                        : component monitor      : *  Intermittent open   : If the MAF V PID       :
:                        : (CCM). If during the   :    or short inside the : suddenly changes below :
:                        : last 40 warm-up cycles :    MAF sensor.         : 0.23 volt or above     :
:                        : in key ON engine       :                        : 4.60 volts, an         :
:                        : running the PCM        :                        : intermittent fault is  :
:                        : detects a voltage (or  :                        : indicated.             :
:                        : air flow) change       :
:                        : beyond the minimum or  :
:                        : maximum calibrated     :
:                        : limit, a continuous    :
:                        : memory diagnostic      :
:                        : trouble code (DTC) is  :
:                        : stored.                :
____________________________________________________________________________________________________

: P1101 - Mass Air Flow  : The MAF sensor circuit : *  Low battery charge  : A MAF V PID reading    :
: (MAF) Sensor Out of    : is monitored by the    : *  MAF sensor          : greater than 0.27      :
: Self-Test Range        : PCM for an out of      :    partially connected : volts (KOEO) or a MAF  :
:                        : range air flow (or     : *  MAF sensor          : V PID reading outside  :
:                        : voltage) input. If     :    contamination       : the 0.46 volt to 2.44  :
:                        : during key ON engine   : *  PWR GND open to MAF : volts range (KOER)     :
:                        : OFF the air flow (or   :    sensor              : indicates a hard       :
:                        : voltage) reading is    : *  MAF RTN circuit     : fault.                 :
:                        : greater than (grams    :    open to PCM         :
:                        : /second equivalent     : *  Damaged MAF sensor  :
:                        : chart in pinpoint test : *  Damaged PCM         :
:                        : DC [0.27 volt]), the   :
:                        : test fails. Likewise,  :
:                        : if during key ON       :
:                        : engine running an air  :
:                        : flow (or voltage)      :
:                        : reading is not within  :
:                        : (gram/second           :
:                        : equivalent chart in    :
:                        : pinpoint test DC [0.46 :
:                        : volt to 2.44 volts]),  :
:                        : the test fails.        :
____________________________________________________________________________________________________

: P1109 - Intake Air     : Indicates IAT2 circuit : *  Damaged harness     : Monitor IAT2 on scan   :
: Temperature 2 Sensor   : became intermittently  : *  Damaged sensor      : tool, look for sudden  :
: Intermittent           : open or shorted while  : *  Damaged harness     : changes in reading     :
:                        : engine was running.    :    connector           : when harness is        :
:                        :                        : *  Damaged PCM         : wiggled or sensor is   :
:                        :                        :                        : tapped.                :
____________________________________________________________________________________________________

: P1112 - Intake Air     : Indicates IAT sensor   : *  Damaged harness     : Monitor IAT on scan    :
: Temperature (IAT)      : signal was             : *  Damaged sensor      : tool, look for sudden  :
: Sensor Intermittent    : intermittent during    : *  Damaged harness     : changes in reading     :
:                        : the comprehensive      :    connector           : when harness is        :
:                        : component monitor.     : *  Damaged PCM         : wiggled or sensor is   :
:                        :                        :                        : tapped.                :
____________________________________________________________________________________________________

: P1114 - Intake Air     : Indicates the sensor   : *  Grounded circuit in : Monitor IAT2 PID.      :
: Temperature 2 Circuit  : signal is less than    :    harness             : Typical IAT2           :
: Low Input              : Self-Test minimum. The : *  Improper harness    : temperature should be  :
:                        : IAT2 sensor minimum is :    connection          : greater than IAT1.     :
:                        : 0.2 volts.             : *  Damaged sensor      : Refer to Section 6:    :
:                        :                        : *  Damaged PCM         : Reference Values for   :
:                        :                        :                        : ranges.                :
____________________________________________________________________________________________________

: P1115 - Intake Air     : Indicates the sensor   : *  Open circuit in     : Monitor IAT2 PID.      :
: Temperature 2 Circuit  : signal is greater than :    harness             : Typical IAT2           :
: High Input             : Self-Test maximum. The : *  Sensor signal short : temperature should be  :
:                        : IAT2 sensor maximum is :    to power            : greater than IAT1.     :
:                        : 4.6 volts.             : *  Improper harness    : Refer to Section 6:    :
:                        :                        :    connection          : Reference Values for   :
:                        :                        : *  Damaged sensor      : ranges.                :
:                        :                        : *  Damaged PCM         :
____________________________________________________________________________________________________

: P1116 - Engine Coolant : Indicates the ECT      : *  Overheating         : Engine coolant         :
: Temperature (ECT)      : sensor is out of Self  :    condition           : temperature must be    :
: Sensor Out of Self     : -Test range. Correct   : *  Malfunctioning      : greater than 10C      :
: -Test Range            : range is 0.3 to 3.7    :    thermostat          : (50F) to pass the     :
:                        : volts.                 : *  Damaged ECT sensor  : KOEO Self-Test and     :
:                        :                        : *  Low engine coolant  : greater than 82C      :
:                        :                        : *  Damaged harness     : (180F) to pass the    :
:                        :                        :    connector           : KOER Self-Test.        :
:                        :                        : *  Damaged PCM         :
____________________________________________________________________________________________________

: P1117 - Engine Coolant : Indicates ECT circuit  : *  Damaged harness     : -  Monitor ECT on scan :
: Temperature (ECT)      : became intermittently  : *  Damaged sensor      :    tool, look for      :
: Sensor Intermittent    : open or shorted while  : *  Damaged PCM         :    sudden changes in   :
:                        : engine was running.    : *  Damaged harness     :    reading when        :
:                        :                        :    connector           :    harness is wiggled  :
:                        :                        : *  Low engine coolant  :    or sensor is        :
:                        :                        :                        :    tapped.             :
____________________________________________________________________________________________________

: P1120 - Throttle       : The TP sensor circuit  : *  TP circuit with     : A TP PID (TP V PID)    :
: Position (TP) Sensor   : is monitored by the    :    frayed wires        : between 3.42 and 9.85% :
: Out of Range Low       : PCM for a low TP       : *  Corrosion on TP     : (0.17 and 0.49 volt)   :
: (RATCH too Low)        : rotation angle (or     :    circuit connectors  : in key ON engine OFF,  :
:                        : voltage) input below   : *  VREF open to TP     : continuous memory or   :
:                        : the closed throttle    :    sensor              : key ON engine running  :
:                        : position through the   : *  VREF short to SIG   : indicates a hard       :
:                        : comprehensive          :    RTN                 : fault.                 :
:                        : component monitor      : *  TP sensor loose     :
:                        : (CCM). If during key   :    pins                :
:                        : ON engine OFF or key   :
:                        : ON engine running the  :
:                        : TP rotation angle (or  :
:                        : voltage) remains       :
:                        : within the calibrated  :
:                        : self-test range but    :
:                        : falls between 3.42 and :
:                        : 9.85% (0.17 and 0.49   :
:                        : volt), the test fails. :
____________________________________________________________________________________________________

: P1121 - Throttle       : The PCM monitors a     : *  Air leak between    : Drive vehicle and      :
: Position (TP) Sensor   : vehicle operation      :    MAF sensor and      : exercise throttle and  :
: Inconsistent with MAF  : rationality check by   :    throttle body       : TP sensor in all       :
: Sensor                 : comparing sensed       : *  TP sensor not       : gears. A TP PID (TP V  :
:                        : throttle position to   :    seated properly     : PID) less than 4.82 %  :
:                        : mass air flow          : *  Damaged TP sensor   : (0.24 volt) with a     :
:                        : readings. If during    : *  Damaged MAF sensor  : LOAD PID greater than  :
:                        : key ON engine running  :                        : 55% or a TP V PID      :
:                        : self-test the          :                        : greater than 49.05%    :
:                        : comparison of the TP   :                        : (2.44 volts) with a    :
:                        : sensor and MAF sensor  :                        : LOAD PID less than 30% :
:                        : readings are not       :                        : indicates a hard       :
:                        : consistent with        :                        : fault.                 :
:                        : calibrated load values :
:                        : , the test fails and a :
:                        : diagnostic trouble     :
:                        : code is stored in      :
:                        : continuous memory.     :
____________________________________________________________________________________________________

: P1124 - Throttle       : The TP sensor circuit  : *  Binding or bent     : A TP PID (TP V PID)    :
: Position (TP) Sensor   : is monitored by the    :    throttle linkage    : reading not between    :
: Out of Self-Test Range : PCM for an out of      : *  TP sensor not       : 13.27 and 23.52% (0.66 :
:                        : range TP rotation      :    seated properly     : and 1.17 volts) in key :
:                        : angle (or voltage)     : *  Throttle plate      : ON engine OFF or key   :
:                        : input. If during key   :    below closed        : ON engine running      :
:                        : ON engine OFF or key   :    throttle position   : indicates a hard       :
:                        : ON engine running the  : *  Throttle plate      : fault.                 :
:                        : TP rotation angle (or  :    /screw misadjusted  :
:                        : voltage) reading is    : *  Damaged TP sensor   :
:                        : less than 13.27% (0.66 : *  Damaged PCM         :
:                        : volt) or greater than  :
:                        : 23.52% (1.17 volts),   :
:                        : the test fails.        :
____________________________________________________________________________________________________

: P1125 - Throttle       : The TP sensor circuit  : *  Poor continuity     : While accessing the TP :
: Position (TP) Sensor   : is monitored by the    :    through the TP      : V PID on the scan tool :
: Intermittent           : PCM for sudden TP      :    sensor connectors   : , lightly tap on the   :
:                        : rotation angle (or     : *  Poor continuity     : TP sensor or wiggle    :
:                        : voltage) input change  :    through the TP      : the TP sensor          :
:                        : through the            :    harness             : connector and harness. :
:                        : comprehensive          : *  Intermittent open   : If the TP V PID        :
:                        : component monitor      :    or short inside the : suddenly changes below :
:                        : (CCM). If during the   :    TP sensor           : 0.49 volt or above     :
:                        : last 80 warm-up cycles :                        : 4.65 volts, an         :
:                        : in key ON engine       :                        : intermittent fault is  :
:                        : running the PCM        :                        : indicated.             :
:                        : detects a TP rotation  :
:                        : angle (or voltage)     :
:                        : changes beyond the     :
:                        : minimum or maximum     :
:                        : calibrated limit, a    :
:                        : continuous diagnostic  :
:                        : trouble code (DTC) is  :
:                        : stored.                :
____________________________________________________________________________________________________

: P1127 - Exhaust Not    : The HEGO monitor uses  : *  Engine not          : Monitor HO2S Heater    :
: Warm Enough,           : an exhaust temperature :    operating long      : PIDs to determine      :
: Downstream Sensor Not  : model to determine     :    enough prior to     : their ON/OFF state.    :
: Tested                 : when the HO2S heaters  :    performing KOER     : DTC P1127 will be      :
:                        : are cycled ON. The     :    self-test.          : present if the exhaust :
:                        : test fails when the    : *  Exhaust system too  : is not hot.            :
:                        : inferred exhaust       :    cool.               :
:                        : temperature is below a :
:                        : minimum calibrated     :
:                        : value.                 :
____________________________________________________________________________________________________

: P1128 - Upstream       : The HEGO monitor       : *  Crossed HO2S        :
: Oxygen Sensors Swapped : checks and determines  :    harness connectors  :
: from Bank to Bank      : if the HO2S signal     :    (upstream).         :
: (HO2S-11-21)           : response for a fuel    : *  Crossed HO2S wiring :
:                        : shift corresponds to   :    at the harness      :
:                        : the correct engine     :    connectors          :
:                        : bank. The test fails   :    (upstream).         :
:                        : when a response from   : *  Crossed HO2S wiring :
:                        : the HO2S(s) being      :    at the 104-pin      :
:                        : tested is not          :    harness connectors  :
:                        : indicated.             :    (upstream).         :
____________________________________________________________________________________________________

: P1129 - Downstream     : The HEGO monitor       : *  Crossed HO2S        :
: Oxygen Sensors Swapped : checks and determines  :    harness connectors  :
: from Bank to Bank      : if the HO2S signal     :    (downstream).       :
: (HO2S-12-22)           : response for a fuel    : *  Crossed HO2S wiring :
:                        : shift corresponds to   :    at the harness      :
:                        : the correct engine     :    connectors          :
:                        : bank. The test fails   :    (downstream).       :
:                        : when a response from   : *  Crossed HO2S wiring :
:                        : the HO2S(s) being      :    at the 104-pin      :
:                        : tested is not          :    harness connectors  :
:                        : indicated.             :    (downstream).       :
____________________________________________________________________________________________________

: P1130 - Lack of HO2S   : The HEGO Sensor is     :    Electrical:         : A fuel control HO2S    :
: -11 Switch, Fuel Trim  : monitored for          :   *  Short to VPWR in  : PID switching across   :
: at Limit               : switching. The test    :      harness or HO2S   : 0.45 volt from 0.2 to  :
:                        : fails when the HO2S    :   *  Water in harness  : 0.9 volt indicates a   :
:                        : fails to switch due to :      connector         : normal switching HO2S. :
:                        : circuit or fuel at or  :   *  Open/Shorted HO2S :
:                        : exceeding a calibrated :      circuit           :
:                        : limit.                 :   *  Corrosion or poor :
:                        :                        :      mating terminals  :
:                        :                        :      and wiring        :
:                        :                        :   *  Damaged HO2S      :
:                        :                        :   *  Damaged PCM       :
:                        :                        :    Fuel System:        :
:                        :                        :   *  Excessive fuel    :
:                        :                        :      pressure          :
:                        :                        :   *  Leaking           :
:                        :                        :      /contaminated     :
:                        :                        :      fuel injectors    :
:                        :                        :   *  Leaking fuel      :
:                        :                        :      pressure          :
:                        :                        :      regulator         :
:                        :                        :   *  Low fuel pressure :
:                        :                        :      or running out of :
:                        :                        :      fuel              :
:                        :                        :   *  Vapor recovery    :
:                        :                        :      system            :
:                        :                        :    Induction System:   :
:                        :                        :   *  Air leaks after   :
:                        :                        :      the MAF           :
:                        :                        :   *  Vacuum Leaks      :
:                        :                        :   *  PCV system        :
:                        :                        :   *  Improperly seated :
:                        :                        :      engine oil        :
:                        :                        :      dipstick          :
:                        :                        :    EGR System:         :
:                        :                        :   *  Leaking gasket    :
:                        :                        :   *  Stuck EGR valve   :
:                        :                        :   *  Leaking diaphragm :
:                        :                        :      or EVR            :
:                        :                        :    Base Engine:        :
:                        :                        :   *  Oil overfill      :
:                        :                        :   *  Cam timing        :
:                        :                        :   *  Cylinder          :
:                        :                        :      compression       :
:                        :                        :   *  Exhaust leaks     :
:                        :                        :      before or near    :
:                        :                        :      the HO2S(s)       :
____________________________________________________________________________________________________


: P1131 - Lack of HO2S   : A HEGO sensor          : See Possible Causes    :
: -11 Switch, Sensor     : indicating lean at the : for DTC P1130          :
: Indicates Lean         : end of a test is       :
:                        : trying to correct for  :
:                        : an over-rich           :
:                        : condition. The test    :
:                        : fails when the fuel    :
:                        : control system no      :
:                        : longer detects         :
:                        : switching for a        :
:                        : calibrated amount of   :
:                        : time.                  :
____________________________________________________________________________________________________

: P1132 - Lack of HO2S   : A HEGO sensor          : See Possible Causes    :
: -11 Switch, Sensor     : indicating rich at the : for DTC P1130          :
: Indicates Rich         : end of a test is       :
:                        : trying to correct for  :
:                        : an over-lean           :
:                        : condition. The test    :
:                        : fails when the fuel    :
:                        : control system no      :
:                        : longer detects         :
:                        : switching for a        :
:                        : calibrated amount of   :
:                        : time.                  :
____________________________________________________________________________________________________

: P1137 - Lack of HO2S   : The downstream HO2S    : *  Pinched, shorted,   :
: -12 Switch, Sensor     : sensors are forced     :    and corroded wiring :
: Indicates Lean         : rich and lean and      :    and pins            :
:                        : monitored by the PCM.  : *  Crossed sensor      :
:                        : The test fails if the  :    wires               :
:                        : PCM does not detect    : *  Exhaust leaks       :
:                        : the output of the HO2S : *  Contaminated or     :
:                        : in a calibrated amount :    damaged sensor      :
:                        : of time.               :
____________________________________________________________________________________________________

: P1138 - Lack of HO2S   : See DTC P1137          :
: -12 Switch, Sensor     :
: Indicates Rich         :
____________________________________________________________________________________________________

: P1150 - Lack of HO2S   : See DTC P1130          :
: -21 Switch, Fuel Trim  :
: at Limit               :
____________________________________________________________________________________________________

: P1151 - Lack of HO2S   : A HEGO sensor          : See Possible Causes    :
: -21 Switch, Sensor     : indicating lean at the : for DTC P1130          :
: Indicates Lean         : end of a test is       :
:                        : trying to correct for  :
:                        : an over-rich           :
:                        : condition. The test    :
:                        : fails when fuel        :
:                        : control system no      :
:                        : longer detects         :
:                        : switching for a        :
:                        : calibrated amount of   :
:                        : time.                  :
____________________________________________________________________________________________________

: P1152 - Lack of HO2S   : A HEGO sensor          : See Possible Causes    :
: -21 Switch, Sensor     : indicating rich at the : for DTC P1130          :
: Indicates Rich         : end of a test is       :
:                        : trying to correct for  :
:                        : an over-lean           :
:                        : condition. The test    :
:                        : fails when the fuel    :
:                        : control system no      :
:                        : longer detects         :
:                        : switching for a        :
:                        : calibrated amount of   :
:                        : time.                  :
____________________________________________________________________________________________________

: P1157 - Lack of HO2S   : See DTC P1137          :
: -22 Switch, Sensor     :
: Indicates Lean         :
____________________________________________________________________________________________________

: P1158 - Lack of HO2S   : See DTC P1137          :
: -22 Switch, Sensor     :
: Indicates Rich         :
____________________________________________________________________________________________________

: P1168 - Fuel Rail      : The comprehensive      : *  Low fuel pressure   :    A FRP PID value     :
: Pressure Sensor in     : component monitor      : *  Damaged FRP sensor  :    below 551 kpa (80   :
: Range But Low          : (CCM) monitors the FRP : *  Excessive           :    psi) indicates a    :
:                        : pressure for           :    resistance in       :    failure             :
:                        : acceptable fuel        :    circuit             :   *  Low or no fuel    :
:                        : pressure. The test     : *  Low or no fuel      :    A FRP PID value     :
:                        : fails when the fuel    :                        :    greater than 896    :
:                        : pressure falls below a :                        :    kpa (130 psi)       :
:                        : calibrated value.      :                        :    indicates a failure :
____________________________________________________________________________________________________

: P1169 - Fuel Rail      : The comprehensive      : *  High fuel pressure  :
: Pressure (FRP) Sensor  : component monitor      : *  Low fuel pressure   :
: in Range But High      : (CCM) monitors the FRP : *  Damaged FRP sensor  :
:                        : pressure for           : *  Excessive           :
:                        : acceptable fuel        :    resistance in       :
:                        : pressure. The test     :    circuit             :
:                        : fails when the fuel    :
:                        : pressure falls below   :
:                        : or exceeds a minimum   :
:                        : /maximum calibrated    :
:                        : value for a calibrated :
:                        : period of time.        :
____________________________________________________________________________________________________

: P1180 - Fuel Delivery  : The PCM receives fuel  : *  Restriction in the  :
: System - Low           : tank pressure (FTP)    :    fuel line           :
:                        : information from the   : *  Plugged fuel filter :
:                        : natural gas module     :
:                        : (NG), which uses the   :
:                        : information to infer   :
:                        : fuel rail pressure     :
:                        : (FRP). The test fails  :
:                        : when the inferred      :
:                        : pressure is less than  :
:                        : a minimum calibrated   :
:                        : value.                 :
____________________________________________________________________________________________________

: P1181 - Fuel Delivery  : The PCM receives fuel  : *  Fuel pressure       :
: System - High          : tank pressure (FTP)    :    regulator           :
:                        : information from the   :
:                        : natural gas module     :
:                        : (NG), which uses the   :
:                        : information to infer   :
:                        : fuel rail pressure     :
:                        : (FRP). The test fails  :
:                        : when the inferred      :
:                        : pressure is higher     :
:                        : than a maximum         :
:                        : calibrated value.      :
____________________________________________________________________________________________________

: P1183 - Engine Oil     : Indicates EOT circuit  : *  Damaged harness     : Using signal           :
: Temperature (EOT)      : became intermittently  : *  Damaged sensor      : simulation, disconnect :
: Sensor Circuit         : open or shorted while  : *  Damaged harness     : sensor and simulate    :
: Malfunction            : engine was running.    :    connector           : 1.0V on sensor signal  :
:                        :                        : *  Damaged PCM         : circuit. Simulated     :
:                        :                        :                        : 1.0V signal and scan   :
:                        :                        :                        : PID voltage value      :
:                        :                        :                        : should be similar. If  :
:                        :                        :                        : voltage is similar     :
:                        :                        :                        : check sensor, if       :
:                        :                        :                        : voltage is not similar :
:                        :                        :                        : check related circuit  :
:                        :                        :                        : and PCM.               :
____________________________________________________________________________________________________

: P1184 - Engine Oil     : Indicates EOT signal   : *  Damaged harness     : Using signal           :
: Temperature (EOT)      : was out of Self-Test   : *  Damaged sensor      : simulation, disconnect :
: Sensor Out of Self     : range. Correct range   : *  Damaged harness     : sensor and simulate    :
: -Test Range            : for KOER is.3-1.2      :    connector           : 1.0V on sensor signal  :
:                        : volts.                 : *  Damaged PCM         : circuit. Simulated     :
:                        :                        :                        : 1.0V signal and scan   :
:                        :                        :                        : PID voltage value      :
:                        :                        :                        : should be similar. If  :
:                        :                        :                        : voltage is similar     :
:                        :                        :                        : check sensor, if       :
:                        :                        :                        : voltage is not similar :
:                        :                        :                        : check related circuit  :
:                        :                        :                        : and PCM.               :
____________________________________________________________________________________________________

: P1229 - Supercharger   : The ICP DTC will be    : *  Pump motor open     : Check for voltage at   :
: Intercooler Pump (ICP) : set when the PCM is    :    circuited           : relay, check fuse in   :
: Pump Not Operating     : calling for the pump   : *  Pump relay coil     : power feed, check      :
:                        : to be operating but no :    open                : ground connection of   :
:                        : current is being       : *  Open circuit        : pump motor, PID        :
:                        : detected.              :    between relay and   : reading is on/off.     :
:                        :                        :    pump                :
:                        :                        : *  Damaged PCM         :
:                        :                        : *  Pump motor shorted  :
:                        :                        : *  Open circuit        :
:                        :                        :    between PCM and     :
:                        :                        :    relay               :
:                        :                        : *  Poor pump ground    :
:                        :                        :    connection          :
____________________________________________________________________________________________________

: P1232 - Low Speed Fuel : Monitors the low speed : *  Open or shorted low : -  An open circuit or  :
: Pump Primary Circuit   : fuel pump (LFP)        :    fuel pump (LFP)     :    short to ground can :
: Malfunction            : primary circuit output :    circuit             :    only be detected    :
:                        : from the PCM. The test : *  Open VPWR to low    :    with the low speed  :
:                        : fails if: When the LFP :    speed fuel pump     :    fuel pump.          :
:                        : circuit is commanded   :    relay               : -  A short to power    :
:                        : on (grounded),         : *  Damaged low speed   :    can only be         :
:                        : excessive current draw :    fuel pump relay     :    detected with the   :
:                        : is detected on the LFP : *  Damaged PCM         :    low speed fuel pump :
:                        : circuit; or when the   :                        :    commanded on.       :
:                        : LFP circuit is         :                        : -  During KOEO and     :
:                        : commanded off, voltage :                        :    KOER Self-Test, the :
:                        : is not detected on the :                        :    low speed fuel pump :
:                        : LFP circuit (the PCM   :                        :    output command will :
:                        : expects to detect VPWR :                        :    be cycled on and    :
:                        : voltage coming through :                        :    off.                :
:                        : the low speed fuel     :
:                        : pump relay coil to the :
:                        : LFP circuit).          :
____________________________________________________________________________________________________

: P1233 - Fuel System    : Note: For LS6/LS8,     : *  Inertia fuel        : The PCM expects to see :
: Disabled or Offline    : P1233 indicates the    :    shutoff (IFS)       : one of the following   :
:                        : PCM is not receiving   :    switch needs to be  : duty cycle signals     :
:                        : the fuel level         :    reset               : from the FPDM on the   :
:                        : information on SCP     : *  Open FPDM ground    : FPM circuit: 1) 50%    :
:                        : from the rear          :    circuit             : (500 msec on, 500 msec :
:                        : electronics module     : *  Open or shorted FPM : off), all OK. 2) 25%   :
:                        : (REM). Refer to the    :    circuit             : (250 msec on, 750 msec :
:                        : Workshop Manual        : *  Damaged IFS switch  : off), FPDM did not     :
:                        : Section 413-01 for     : *  Damaged FPDM        : receive a fuel pump    :
:                        : diagnostics. Monitors  : *  Damaged PCM         : (FP) duty cycle        :
:                        : the fuel pump monitor  :   -  Also for Escort   : command from the PCM,  :
:                        : (FPM) circuit from the :      /Tracer and       : or the duty cycle that :
:                        : fuel pump driver       :      Mustang:          : was received was       :
:                        : module (FPDM). With    :   -  Open FPDM PWR     : invalid. 3) 75% (750   :
:                        : the key on, the FPDM   :      circuit           : msec ON, 250 OFF), the :
:                        : continuously sends a   :   -  Open B+ circuit   : FPDM has detected a    :
:                        : duty cycle signal to   :      to constant       : fault in the circuits  :
:                        : the PCM through the    :      control relay     : between the FPDM and   :
:                        : FPM circuit. The test  :      module (CCRM) pin : the fuel pump.         :
:                        : fails if the PCM stops :      11                :
:                        : receiving the duty     :   -  Open ground to    :
:                        : cycle signal.          :      CCRM pin 18       :
:                        :                        :      (Mustang)         :
:                        :                        :   -  Damaged CCRM      :
:                        :                        :   -   Also for         :
:                        :                        :      Continental:      :
:                        :                        :   -  Open VPWR circuit :
:                        :                        :      to FPDM           :
____________________________________________________________________________________________________

: P1234 - Fuel System    : See DTC P1233. P1234   :
: Disabled or Offline    : is identical to P1233  :
:                        : except P1234 will not  :
:                        : illuminate the MIL.    :
____________________________________________________________________________________________________

: P1235 - Fuel Pump      : Note: For LS6/LS8, the : *  FP circuit open or  : The FPDM sends a 25%   :
: Control Out Of Range   : FPDM functions are     :    shorted             : duty cycle (250 msec   :
:                        : incorporated in the    : *  Damaged FPDM.       : ON, 750 msec OFF)      :
:                        : Rear Electronics       : *  Damaged PCM         : through the FPM        :
:                        : Module (REM). Also,    :                        : circuit to the PCM     :
:                        : the REM does not use a :                        : while the fault is     :
:                        : FPM circuit.           :                        : being detected by the  :
:                        : Diagnostic information :                        : FPDM. If the fault is  :
:                        : will be sent through   :                        : no longer detected,    :
:                        : SCP. Indicates that    :                        : the PDM will return to :
:                        : the FPDM has detected  :                        : sending an "all OK"    :
:                        : an invalid or missing  :                        : (50% duty cycle)       :
:                        : FP circuit signal from :                        : message to the PCM.    :
:                        : the PCM. The FPDM will :                        : The PCM will keep      :
:                        : send a message to the  :                        : P1235 stored in        :
:                        : PCM through the FPM    :                        : Continuous Memory.     :
:                        : circuit, indicating    :
:                        : that this failure has  :
:                        : been detected. The PCM :
:                        : will set the DTC when  :
:                        : the message is         :
:                        : received.              :
____________________________________________________________________________________________________

: P1236 - Fuel Pump      : See DTC P1235. P1236   :
: Control Out Of Range   : is identical to P1235  :
:                        : except P1236 will not  :
:                        : illuminate the MIL.    :
____________________________________________________________________________________________________

: P1237 - Fuel Pump      : Note: For LS6/LS8, the : *  Open or shorted FP  : -  The FPDM sends a    :
: Secondary Circuit      : FPDM functions are     :    PWR circuit         :    75% duty cycle (750 :
: Malfunction            : incorporated in the    : *  Open FP Rtn circuit :    msec ON, 250 msec   :
:                        : rear electronics       :    to FPDM             :    OFF) through the    :
:                        : module (REM). Also,    : *  Open or shorted     :    FPM circuit to the  :
:                        : the REM does not use a :    circuit in the fuel :    PCM while the fault :
:                        : FPM circuit.           :    pump                :    is being detected   :
:                        : Diagnostic information : *  Locked fuel pump    :    by the FPDM. If the :
:                        : will be set through    :    rotor               :    fault is no longer  :
:                        : SCP. Indicates that    : *  Damaged FPDM        :    detected, the PCM   :
:                        : the FPDM has detected  : *  For LS6/LS8,        :    will return to      :
:                        : a fuel pump secondary  :    circuits associated :    sending an "all OK" :
:                        : circuit fault. The     :    with the Fuel Pump  :    (50% duty cycle)    :
:                        : FPDM will send a       :    relay               :    message to the PCM. :
:                        : message to the PCM     :                        :    The PCM will keep   :
:                        : through the FPM        :                        :    P1237 stored in     :
:                        : circuit, indicating    :                        :    Continuous Memory.  :
:                        : that this failure has  :                        : -  The FPDM controls   :
:                        : been detected. The PCM :                        :    pump speed by       :
:                        : will set the DTC when  :                        :    supplying a         :
:                        : the message is         :                        :    "variable" ground   :
:                        : received.              :                        :    on the RTN circuit. :
____________________________________________________________________________________________________

: P1238 - Fuel Pump      : See DTC P1237. P1238   :
: Secondary Circuit      : is identical to P1237  :
: Malfunction            : except P1238 will not  :
:                        : illuminate the MIL.    :
____________________________________________________________________________________________________

: P1244 - Generator Load : The PCM monitors the   : *   ALI circuit open   : Verify operation of    :
: Input Low              : GLI circuit, and will  :    or short            : charging system.       :
:                        : set the DTC when the   : *   Damaged voltage    :
:                        : input is below         :    regulator/generator :
:                        : calibrated limit for a : *   Damaged PCM        :
:                        : calibrated amount of   :
:                        : time.                  :
____________________________________________________________________________________________________

: P1245 - Generator Load : The PCM monitors the   : *  ALI circuit open or : Verify operation of    :
: Input High             : GLI circuit, and will  :    short               : charging system.       :
:                        : set the DTC when the   : *  Damaged voltage     :
:                        : input is above a       :    regulator/generator :
:                        : calibrated limit for a : *  Damaged PCM         :
:                        : calibrated amount of   :
:                        : time.                  :
____________________________________________________________________________________________________

: P1246 - Generator Load : The PCM monitors the   : *  ALI circuit         : *  Verify operation of :
: Input (2.0L Contour    : GLI circuit, and will  :    concern.            :    charging system.    :
: /Mystique/Cougar)      : set the DTC when the   : *  Damaged voltage     : *  Verify battery is   :
:                        : input is not within a  :    regulator/generator :    at proper charge.   :
:                        : calibrated limit for a : *  Damaged PCM.        :
:                        : calibrated amount of   :
:                        : time.                  :
____________________________________________________________________________________________________

: P1246 - Generator Load : The PCM monitors       : *  Generator circuit   : -  Verify battery      :
: Input Failed (All      : generator load from    :    short to GND        :    voltage is 14.5V.   :
: Others)                : the generator          : *  Generator circuit   : -  Verify generator    :
:                        : /regulator in the form :    short to PWR        :    /regulator has the  :
:                        : of frequency. The      : *  Generator circuit   :    correct part        :
:                        : frequency range is     :    open                :    number.             :
:                        : determined by the      : *  Generator drive     :
:                        : temperature of the     :    mechanism           :
:                        : voltage regulator      : *  Damaged generator   :
:                        : where 97% represents   :    /regulator assembly :
:                        : full load, below 6%    : *  Damaged PCM         :
:                        : means no load.         :
____________________________________________________________________________________________________

: P1260 - Theft Detected : Indicates that the     : *  Previous theft      : Theft indicator        :
: - Vehicle Immobilized  : passive anti-theft     :    condition           : flashing rapidly or on :
:                        : system (PATS) has      : *  Anti-Theft System   : solid when ignition    :
:                        : determined a theft     :    failure             : switch is in the ON    :
:                        : condition existed and  :                        : position. Check anti   :
:                        : the engine is          :                        : -theft system for      :
:                        : disabled. This DTC is  :                        : DTCs. Typical vehicle  :
:                        : a good indicator to    :                        : symptoms are: Start    :
:                        : check the PATS for     :                        : /Stall or Crank/No     :
:                        : DTCs.                  :                        : Start. NOTE: No crank  :
:                        :                        :                        : symptom only on        :
:                        :                        :                        : vehicles equipped with :
:                        :                        :                        : PATS starter disable   :
:                        :                        :                        : feature.               :
____________________________________________________________________________________________________

: P1270 - Engine RPM     : Indicates the vehicle  : *  Wheel slippage      : The DTC indicates the  :
: /Vehicle Speed Limiter : has been operated in a :    (water, ice, mud    : vehicle has been       :
:                        : manner which caused    :    and snow)           : operated in a manner   :
:                        : the engine or vehicle  : *  Excessive engine    : which caused the       :
:                        : to exceed a            :    rpm in Neutral      : engine or vehicle      :
:                        : calibration limit. The : *  Vehicle drive at a  : speed to exceed a      :
:                        : engine rpm and vehicle :    high rate of speed  : calibrated limit.      :
:                        : speed are continuously :
:                        : monitored by the PCM.  :
:                        : The DTC is set when    :
:                        : the rpm or speed fall  :
:                        : out of calibrated      :
:                        : range. For additional  :
:                        : information on the     :
:                        : engine rpm/vehicle     :
:                        : speed limiter, refer   :
:                        : to Section 1,          :
:                        : Electronic Engine      :
:                        : Control (EC) System,   :
:                        : Powertrain Control     :
:                        : Software.              :
____________________________________________________________________________________________________

: P1285 - Cylinder Head  : Indicates an engine    : *  Low engine coolant  : On some applications   :
: Over Temperature       : overheat condition was :    level               : when this fault occurs :
: Sensed                 : sensed by the cylinder : *  Base engine         : the Engine Temperature :
:                        : head temperature       :    concerns            : warning indicator will :
:                        : sensor.                : *  Engine cooling      : illuminate and force   :
:                        :                        :    system concerns     : the temperature gauge  :
:                        :                        : *  CHT sensor concern  : to full H (Hot) zone   :
:                        :                        :                        : by ground circuit 39.  :
____________________________________________________________________________________________________

: P1288 - Cylinder Head  : Indicates the CHT      : *  Cold engine         : Bring engine to        :
: Temperature (CHT)      : sensor is out of Self  : *  Engine overheating  : operating temperature. :
: Sensor Circuit Out of  : -Test range. Engine    : *  Damaged harness     : If cold, re-run self   :
: Self-Test Range        : not at operating       :    connector           : -test. If engine over  :
:                        : temperature.           : *  Damaged PCM         : -heats check cooling   :
:                        :                        : *  Low engine coolant  : system.                :
:                        :                        :    level               :
:                        :                        : *  Damaged CHT sensor  :
____________________________________________________________________________________________________

: P1289 - Cylinder Head  : Indicates a CHT sensor : *   Grounded circuit   : Using signal           :
: Temperature (CHT)      : circuit malfunction    :    in CHT harness      : simulation, disconnect :
: Sensor Circuit High    : (shorted).             : *   Damaged CHT sensor : sensor and simulate a  :
: Input (PCM STRATEGIES  :                        : *   Improper harness   : voltage on sensor      :
: UP TO AND INCLUDING    :                        :    connection          : signal circuit.        :
: 1998)                  :                        : *   Damaged PCM        : Simulated 1.0V signal  :
:                        :                        :                        : and scan PID voltage   :
:                        :                        :                        : value should be        :
:                        :                        :                        : similar. If voltage is :
:                        :                        :                        : similar check sensor,  :
:                        :                        :                        : if voltage is not      :
:                        :                        :                        : similar check related  :
:                        :                        :                        : circuit and PCM. Note  :
:                        :                        :                        : DTC P0117 may also be  :
:                        :                        :                        : reported, this will    :
:                        :                        :                        : activate the MIL       :
:                        :                        :                        : light.                 :
____________________________________________________________________________________________________

: P1289 - Cylinder Head  : Indicates a CHT sensor : *  Open circuit in CHT : Using signal           :
: Temperature (CHT)      : circuit malfunction    :    harness             : simulation, disconnect :
: Sensor Circuit High    : (open).                : *  Damaged CHT sensor  : sensor and simulate a  :
: Input (PCM STRATEGIES  :                        : *  Improper harness    : voltage on sensor      :
: 1999 AND BEYOND)       :                        :    connection          : signal circuit.        :
:                        :                        : *  Damaged PCM         : Simulated 1.0V signal  :
:                        :                        :                        : and scan PID voltage   :
:                        :                        :                        : value should be        :
:                        :                        :                        : similar. If voltage is :
:                        :                        :                        : similar check sensor,  :
:                        :                        :                        : if voltage is not      :
:                        :                        :                        : similar check related  :
:                        :                        :                        : circuit and PCM. Note: :
:                        :                        :                        : DTC P0118 may also be  :
:                        :                        :                        : reported, this will    :
:                        :                        :                        : activate the MIL       :
:                        :                        :                        : light.                 :
____________________________________________________________________________________________________

: P1290 - Cylinder Head  : Indicates a CHT sensor : *  Open circuit in CHT : Using signal           :
: Temperature (CHT)      : circuit malfunction    :    harness             : simulation, disconnect :
: Sensor Circuit Low     : (open).                : *  Damaged CHT sensor  : sensor and simulate a  :
: Input (PCM STRATEGIES  :                        : *  Improper harness    : voltage on sensor      :
: UP TO AND INCLUDING    :                        :    connection          : signal circuit.        :
: 1998)                  :                        : *  Damaged PCM         : Simulated 1.0V signal  :
:                        :                        :                        : and scan PID voltage   :
:                        :                        :                        : value should be        :
:                        :                        :                        : similar. If voltage is :
:                        :                        :                        : similar check sensor,  :
:                        :                        :                        : if voltage is not      :
:                        :                        :                        : similar check related  :
:                        :                        :                        : circuit and PCM. Note  :
:                        :                        :                        : DTC P0118 may also be  :
:                        :                        :                        : reported, this will    :
:                        :                        :                        : activate the MIL       :
:                        :                        :                        : light.                 :
____________________________________________________________________________________________________

: P1290 - Cylinder Head  : Indicates a CHT sensor : *  Grounded circuit in : Using signal           :
: Temperature (CHT)      : circuit malfunction    :    CHT harness         : simulation, disconnect :
: Sensor Circuit Low     : (shorted).             : *  Damaged CHT sensor  : sensor and simulate a  :
: Input (PCM STRATEGIES  :                        : *  Improper harness    : voltage on sensor      :
: 1999 AND BEYOND)       :                        :    connection          : signal circuit.        :
:                        :                        : *  Damaged PCM         : Simulated 1.0V signal  :
:                        :                        :                        : and scan PID voltage   :
:                        :                        :                        : value should be        :
:                        :                        :                        : similar. If voltage is :
:                        :                        :                        : similar check sensor,  :
:                        :                        :                        : if voltage is not      :
:                        :                        :                        : similar check related  :
:                        :                        :                        : circuit and PCM. Note  :
:                        :                        :                        : DTC P0117 may also be  :
:                        :                        :                        : reported, this will    :
:                        :                        :                        : activate the MIL       :
:                        :                        :                        : light.                 :
____________________________________________________________________________________________________

: P1299 - Cylinder Head  : Indicates an engine    : *  Engine cooling      : Refer to Section 1,    :
: Over Temperature       : overheat condition was :    system concerns     : Electronic Engine      :
: Protection Active      : detected by the        : *  Low engine coolant  : Control (EC) System,   :
:                        : cylinder head          :    level               : for more information   :
:                        : temperature (CHT)      : *  Base engine         : on Fail-safe Cooling   :
:                        : sensor. An FMEM        :    concerns            : Strategy and cylinder  :
:                        : Strategy called Fail   :                        : head temperature       :
:                        : -safe Cooling was      :                        : sensor.                :
:                        : activated to cool the  :
:                        : engine.                :
____________________________________________________________________________________________________

: P1309 - Misfire        : When the misfire       : *  Camshaft position   : Verify the CMP is      :
: Monitor Disabled       : monitor is disabled,   :    sensor              : installed correctly    :
:                        : usually due to the     : *  Powertrain control  : and not out of         :
:                        : input signal generated :    module              : synchronization.       :
:                        : by the camshaft        : *  ECT, MAF, and CKP   :
:                        : position (CMP) sensor, :    sensors             :
:                        : by sensing the passage :
:                        : of teeth from the CMP  :
:                        : wheel.                 :
____________________________________________________________________________________________________

: P1380 - Variable Cam   : The comprehensive      : *  Open or short VCT   : DTC P1380 is a VCT     :
: Timing Solenoid A      : component monitor(CCM) :    circuit             : circuit check. Testing :
: Circuit Malfunction    : monitors the VCT       : *  Open VPWR circuit   : should include wires,  :
:                        : circuit to the PCM for : *  Damaged PCM         : solenoid coil and PCM. :
:                        : high and low voltage.  : *  Open or short VCT   :
:                        : If during testing      :    solenoid valve      :
:                        : voltage was to fall    :
:                        : below a calibrated     :
:                        : limit a calibrated     :
:                        : amount of time the     :
:                        : test will fail.        :
____________________________________________________________________________________________________

: P1381 - Variable Cam   : The comprehensive      : *  Cam timing          : P1381 DTC is a check   :
: Timing Over-advanced   : component monitor      :    improperly set      : of the VCT unit.       :
: (Bank 1)               : (CCM) monitors the VCT : *  No oil flow to the  : Testing should not     :
:                        : position for an over   :    VCT piston chamber  : include electrical     :
:                        : -advanced camshaft     : *  Low oil pressure    : checks. Diagnostics    :
:                        : timing. The test fails : *  VCT solenoid valve  : and repair for the VCT :
:                        : when the camshaft      :    stuck closed        : unit are located in    :
:                        : timing exceeds a       : *  Camshaft advance    : the Workshop Manual.   :
:                        : maximum calibrated     :    mechanism binding   :
:                        : value or remains in an :    (VCT unit)          :
:                        : advanced position.     :
____________________________________________________________________________________________________

: P1383 - Variable Cam   : The comprehensive      : *  Cam timing          : DTC P1383 is a check   :
: Timing Over-retarded   : component monitor      :    improperly set      : of the VCT unit.       :
: (Bank 1)               : (CCM) monitors the VCT : *  Continuous oil flow : Testing should not     :
:                        : position for over      :    to the VCT piston   : include electrical     :
:                        : -retarded camshaft     :    chamber             : checks. Engine will    :
:                        : timing. The test fails : *  VCT solenoid valve  : idle rough, hard       :
:                        : when the camshaft      :    stuck open          : starting and may       :
:                        : timing exceeds a       : *  Camshaft advance    : stall. Diagnostics and :
:                        : maximum calibrated     :    mechanism binding   : repair for the VCT     :
:                        : value or remains in an :    (VCT unit)          : unit are located in    :
:                        : retarded position.     :                        : the Workshop Manual.   :
____________________________________________________________________________________________________

: P1390 - Octane Adjust  : The octane adjust is   : *  Powertrain control  : Do not activate the    :
: (OCTADJ)               : software activated in  :    module (PCM)        : octane adjust software :
:                        : the powertrain control :                        : unless directed by a   :
:                        : module, used to retard :                        : Technical Service      :
:                        : spark timing by three  :                        : Bulletin.              :
:                        : degrees. The hardware  :
:                        : shorting bar has been  :
:                        : removed.               :
____________________________________________________________________________________________________

: P1400 - DPF EGR Sensor : The EGR monitor checks : *  DPFEGR circuit      : A DPF EGR PID reading  :
: Circuit Low Voltage    : the DPF EGR sensor     :    short to GND        : less than 0.2 volt     :
: Detected               : signal to the PCM for  : *  Damaged DPF EGR     : with the key ON and    :
:                        : low voltage. The test  :    sensor              : engine OFF or running, :
:                        : fails when the average : *  VREF short to GND   : indicates a hard       :
:                        : voltage to the PCM     : *  Damaged PCM         : fault.                 :
:                        : drops to a voltage     :
:                        : less than the minimum  :
:                        : calibrated value.      :
____________________________________________________________________________________________________

: P1401 - DPF EGR Sensor : The EGR monitor checks : *  DPF EGR circuit     : A DPF EGR PID reading  :
: Circuit High Voltage   : the DPF EGR sensor     :    open                : greater than 4.5 volts :
: Detected               : signal to the PCM for  : *  VREF short to PWR   : with the key ON and    :
:                        : high voltage. The test : *  Damaged DPF EGR     : engine OFF or running, :
:                        : fails when the average :    sensor              : indicates a hard       :
:                        : voltage to the PCM     : *  DPFEGR circuit      : fault.                 :
:                        : goes to a voltage      :    short to PWR        :
:                        : greater than the       : *  SIG RTN circuit     :
:                        : maximum calibrated     :    open                :
:                        : value.                 : *  Damaged PCM         :
____________________________________________________________________________________________________

: P1405 - DPF EGR Sensor : While driving, the EGR : *  Upstream hose is    : -  Look for signs of   :
: Upstream Hose Off or   : monitor commands the   :    disconnected        :    water or icing in   :
: Plugged                : EGR valve closed and   : *  Upstream hose is    :    hose                :
:                        : checks the             :    plugged (ice)       : -  Verify hose         :
:                        : differential pressure  : *  Plugged or damaged  :    connection and      :
:                        : across the EGR         :    EGR tube            :    routing (no         :
:                        : orifice. The test      :                        :    excessive dips)     :
:                        : fails when the signal  :                        : -  Verify DPF EGR      :
:                        : from the DPF EGR       :                        :    sensor proper       :
:                        : sensor indicates EGR   :                        :    mounting and        :
:                        : flow is in the         :                        :    function (view DPF  :
:                        : negative direction.    :                        :    EGR PID while       :
:                        :                        :                        :    applying and        :
:                        :                        :                        :    releasing vacuum    :
:                        :                        :                        :    directly to sensor  :
:                        :                        :                        :    with a hand pump)   :
____________________________________________________________________________________________________


: P1406 - DPF EGR Sensor : While driving, the EGR : *  Downstream hose is  : -  Look for signs of   :
: Downstream Hose Off or : monitor commands the   :    disconnected        :    water or icing in   :
: Plugged                : EGR valve closed and   : *  Downstream hose is  :    hose                :
:                        : checks the             :    plugged (ice)       : -  Verify connection   :
:                        : differential pressure  : *  Plugged or damaged  :    and routing (no     :
:                        : across the EGR         :    EGR tube            :    excessive dips)     :
:                        : orifice. The test      :                        : -  Verify DPF EGR      :
:                        : fails when the signal  :                        :    sensor proper       :
:                        : from the DPF EGR       :                        :    mounting and        :
:                        : sensor continues to    :                        :    function (view      :
:                        : indicate EGR flow even :                        :    DPFEGR PID while    :
:                        : after the EGR valve is :                        :    applying and        :
:                        : commanded closed.      :                        :    releasing vacuum    :
:                        :                        :                        :    directly to sensor  :
:                        :                        :                        :    with a hand pump)   :
____________________________________________________________________________________________________

: P1408 - EGR Flow Out   : This test is performed : See Possible Causes    :
: of Self-Test Range     : during the KOER on     : for DTC P0401.         :
:                        : demand self-test only. :
:                        : The EGR system is      :
:                        : commanded ON at a      :
:                        : fixed engine speed.    :
:                        : The test fails and the :
:                        : DTC is output when the :
:                        : measured EGR flow      :
:                        : falls below the        :
:                        : required calibrated    :
:                        : minimum.               :
____________________________________________________________________________________________________

: P1409 - EGR Vacuum     : This test checks the   : *  EGRVR circuit open  : The EGR vacuum         :
: Regulator Solenoid     : electrical function of : *  VPWR open to EGRVR  : regulator solenoid     :
: Circuit Malfunction    : the EGRVR. solenoid.   :    solenoid            : resistance is from 26  :
:                        : The test fails when    : *  EGRVR circuit short : to 40 ohms.            :
:                        : the EGRVR circuit      :    to VPWR or GND      :
:                        : voltage is either too  : *  Damaged EGRVR       :
:                        : high or too low when   :    solenoid            :
:                        : compared to the        : *  Damaged PCM         :
:                        : expected voltage       :
:                        : range. The EGR system  :
:                        : must be enabled for    :
:                        : the test to be         :
:                        : completed.             :
____________________________________________________________________________________________________

: P1411 - Secondary Air  : The secondary air      : *  Electric AIR Pump   : In order to test the   :
: Injection (AIR) system : injection system does  : *  Hose from AIR pump  : AIR pump, it must be   :
: downstream flow        : not detect the         :    leak                : capable of driving the :
:                        : presence of air in the : *  AIR bypass solenoid : HO2S lean.             :
:                        : exhaust when           :    leak/blocked        :
:                        : introduced by the      : *  Hose from AIR pump  :
:                        : secondary air          :    blocked             :
:                        : injection system       : *  AIR bypass solenoid :
:                        :                        :    stuck open/closed   :
____________________________________________________________________________________________________

: P1413                  : The secondary air      : *  Open B+ circuit     : The AIR monitor        :
:                        : injection system       : *  Open AIR circuit    : circuit is held low by :
:                        : monitor circuit is low : *  Damaged PCM         : the resistance path    :
:                        : , indicating the       : *  Air circuit short   : through the AIR pump   :
:                        : electrical AIR pump is :    to ground           : when the pump is off.  :
:                        : off although the       : *  Damaged AIR pump    : Also, look for open    :
:                        : electrical AIR pump    : *  Damaged solid state : circuit from SSR to    :
:                        : was commanded on by    :    relay               : AIR pump.              :
:                        : the PCM.               :
____________________________________________________________________________________________________

: P1414                  : The secondary air      : *  Open AIR monitor    :
:                        : injection system       :    circuit from the    :
:                        : monitor circuit is     :    pump                :
:                        : high, indicating the   : *  AIR circuit short   :
:                        : electrical AIR pump is :    to power            :
:                        : on although the        : *  Damaged solid state :
:                        : electrical AIR pump    :    relay               :
:                        : was commanded off by   : *  Open AIR pump       :
:                        : the PCM.               :    ground              :
:                        :                        : *  Damaged AIR pump    :
:                        :                        : *  Damaged PCM         :
____________________________________________________________________________________________________

: P1443 - Very Small Or  : A fuel tank pressure   : *  Blocked fuel vapor  : Check for blockages    :
: No Purge Flow          : change greater than a  :    hose between EVAP   : between the fuel tank, :
: Condition              : minus (-) 7 inches of  :    canister purge      : EVAP canister purge    :
:                        : H (2) O in 30 seconds  :    valve and FTP       : valve and engine       :
:                        : has occurred with      :    sensor.             : intake manifold. Check :
:                        : purge (fuel vapor)     : *  Blocked fuel vapor  : obstructions in the    :
:                        : flow less than 0.02    :    hose between EVAP   : EVAP canister purge    :
:                        : pounds per minute.     :    canister purge      : valve diaphragm and    :
:                        :                        :    valve and engine    : ports.                 :
:                        :                        :    intake manifold.    :
:                        :                        : *  Blocked vacuum hose :
:                        :                        :    between EVAP        :
:                        :                        :    canister purge      :
:                        :                        :    valve-solenoid and  :
:                        :                        :    engine intake       :
:                        :                        :    manifold.           :
:                        :                        : *  EVAP canister purge :
:                        :                        :    valve stuck closed  :
:                        :                        :    (mechanically).     :
____________________________________________________________________________________________________

: P1450 - Unable to      : Monitors the fuel      : *  Blockages or kinks  :
: Bleed Up Fuel Tank     : vapor vacuum and       :    in EVAP canister    :
: Vacuum                 : pressure in the fuel   :    tube or EVAP        :
:                        : tank. The system       :    canister purge      :
:                        : failure occurs when    :    outlet tube         :
:                        : the EVAP running loss  :    (between fuel tank, :
:                        : monitor detects        :    EVAP canister purge :
:                        : excessive fuel tank    :    valve and EVAP      :
:                        : vacuum with the engine :    canister)           :
:                        : running (but not at    : *  Fuel filler cap     :
:                        : idle).                 :    stuck closed (no    :
:                        :                        :    vacuum relief)      :
:                        :                        : *  Contaminated fuel   :
:                        :                        :    vapor elbow on EVAP :
:                        :                        :    canister            :
:                        :                        : *  Restricted EVAP     :
:                        :                        :    canister            :
:                        :                        : *  CV solenoid stuck   :
:                        :                        :    open (partially or  :
:                        :                        :    fully)              :
:                        :                        : *  Plugged CV solenoid :
:                        :                        :    filter              :
:                        :                        : *  EVAP canister purge :
:                        :                        :    valve stuck open    :
:                        :                        : *  VREF circuit open   :
:                        :                        :    (harness near FTP   :
:                        :                        :    sensor, FTP sensor  :
:                        :                        :    or PCM)             :
:                        :                        : *  Damaged FTP sensor  :
____________________________________________________________________________________________________

: P1451 - EVAP Control   : Monitors the canister  : *  VPWR circuit open   : -  Monitor EVAPCV PID  :
: System Canister Vent   : vent (CV) solenoid     : *  CV solenoid circuit :    and voltage between :
: Solenoid Circuit       : circuit for an         :    shorted to PWR GND  :    canister vent       :
: Malfunction            : electrical failure.    :    or CHASSIS GND      :    solenoid signal and :
:                        : The test fails when    : *  Damaged CV solenoid :    PWR GND in output   :
:                        : the signal moves       : *  CV solenoid circuit :    test mode with key  :
:                        : outside the minimum or :    open                :    ON engine OFF (or   :
:                        : maximum allowable      : *  CV solenoid circuit :    in key ON engine    :
:                        : calibrated parameters  :    shorted to VPWR     :    RUNNING mode)       :
:                        : for a specified        : *  Damaged PCM         : -  EVAPCV PID at 0%    :
:                        : canister vent duty     :                        :    and voltage less    :
:                        : cycle by PCM command.  :                        :    than 1.0 volt (or   :
:                        :                        :                        :    EVAPCV PID at 100%  :
:                        :                        :                        :    and voltage greater :
:                        :                        :                        :    than 0.5 volt)      :
:                        :                        :                        :    indicates a hard    :
:                        :                        :                        :    fault               :
____________________________________________________________________________________________________

: P1460 - Wide Open      : NOTE: For applications : *  Open or shorted WAC : -  When the WACF PID   :
: Throttle A/C Cutout    : that use a normally    :    circuit             :    reads YES, a fault  :
: Primary Circuit        : open relay to control  : *  Damaged WAC relay   :    is currently        :
: Malfunction            : the A/C clutch, the    :    (or CCRM)           :    present             :
:                        : following description  : *  Open VPWR circuit   : -  An open circuit or  :
:                        : applies to the A/C     :    to WAC relay        :    short to ground can :
:                        : clutch relay control   : *  Damaged PCM         :    only be detected    :
:                        : circuit. Monitors the  :                        :    when the PCM is not :
:                        : wide open throttle A/C :                        :    grounding the       :
:                        : cutoff (WAC) circuit   :                        :    circuit             :
:                        : output from the PCM.   :                        : -  A short to power    :
:                        : The test fails if:     :                        :    can only be         :
:                        : When the PCM grounds   :                        :    detected when the   :
:                        : the WAC circuit,       :                        :    PCM is grounding    :
:                        : excessive current draw :                        :    the circuit         :
:                        : is detected on the WAC :                        : -  During KOEO and     :
:                        : circuit; or with the   :                        :    KOER self-test, the :
:                        : WAC circuit not        :                        :    WAC circuit will be :
:                        : grounded by the PCM,   :                        :    cycled ON and OFF   :
:                        : voltage is not         :                        : -  Verify A/C and      :
:                        : detected on the WAC    :                        :    defrost were OFF    :
:                        : circuit (the PCM       :                        :    during KOEO and     :
:                        : expects to detect VPWR :                        :    KOER self-test      :
:                        : voltage coming through :                        :    (Check ACCS PID to  :
:                        : the WAC relay coil to  :                        :    verify)             :
:                        : the WAC circuit).      :                        : -  If vehicle is not   :
:                        :                        :                        :    equipped with A/C,  :
:                        :                        :                        :    DTC P1460 can be    :
:                        :                        :                        :    ignored             :
____________________________________________________________________________________________________

: P1461 - Air            : ACP inputs a voltage   : *  ACP sensor circuit  : Verify VREF voltage    :
: Conditioning Pressure  : to the PCM. If the     :    short to PWR        : between 4.0 and 6.0V.  :
: Sensor (ACP) Sensor    : voltage is above a     : *  ACP circuit open    :
: High Voltage Detected  : calibrated level the   : *  Damaged PCM         :
:                        : DTC will set.          : *  ACP circuit short   :
:                        :                        :    to VREF             :
:                        :                        : *  ACP circuit short   :
:                        :                        :    to SIGRTN           :
:                        :                        : *  Damaged ACP sensor  :
____________________________________________________________________________________________________

: P1462 - Air            : ACP inputs a voltage   : *  ACP circuit short   : Verify VREF voltage    :
: Conditioning Pressure  : to the PCM. If the     :    to GND or SIGRTN    : between 4.0 and 6.0V.  :
: Sensor (ACP) Sensor    : voltage is below the   : *  VREF circuit open   :
: Low Voltage Detected   : calibrated level the   : *  Damaged PCM         :
:                        : DTC will set.          : *  Open ACP circuit    :
:                        :                        : *  Damaged ACP sensor  :
____________________________________________________________________________________________________

: P1463 - Air            : Each time the A/C      : *  A/C system          : Verify A/C system      :
: Conditioning Pressure  : clutch engages, the    :    mechanical failure  : function, including    :
: Sensor (ACP)           : PCM is looking for a   : *  Open ACP or VREF    : refrigerant charge.    :
: Insufficient Pressure  : pressure change in the :    circuit             :
: Change                 : refrigerant. If the    : *  A/C sensor damaged  :
:                        : change in pressure is  : *  A/C system          :
:                        : outside of the         :    electrical failure  :
:                        : calibration the DTC    : *  A/C clutch always   :
:                        : will set.              :    engaged             :
____________________________________________________________________________________________________

: P1464 - A/C Demand Out : Indicates the ACCS     : *  A/C was on during   : If A/C or defrost were :
: Of Self-Test Range     : input to the PCM was   :    self-test           : on during self-test,   :
:                        : high during Self-Test. : *  A/C Clutch PWR      : turn off and rerun     :
:                        :                        :    circuit short to    : test.                  :
:                        :                        :    power (applications :
:                        :                        :    with N/C WAC relay  :
:                        :                        :    contacts)           :
:                        :                        : *  ACCS circuit short  :
:                        :                        :    to power            :
:                        :                        : *  Damaged A/C demand  :
:                        :                        :    switch              :
:                        :                        : *  Damaged WAC relay   :
:                        :                        :    (or CCRM)           :
:                        :                        : *  Damaged PCM         :
____________________________________________________________________________________________________

: P1469 - Low A/C        : Indicates frequent A/C : *  Mechanical A/C      : -  An intermittent     :
: Cycling Period         : compressor clutch      :    system concern      :    open circuit,       :
:                        : cycling.               :    (such as low        :    although possible,  :
:                        :                        :    refrigerant charge, :    is unlikely         :
:                        :                        :    damaged A/C cycling : -  This test was       :
:                        :                        :    switch)             :    designed to protect :
:                        :                        : *  Intermittent open   :    the transmission.   :
:                        :                        :    between the cycling :    In some strategies, :
:                        :                        :    pressure switch and :    the PCM will unlock :
:                        :                        :    pin 41 (ACCS) to    :    the torque          :
:                        :                        :    the PCM             :    converter during A  :
:                        :                        : *  Intermittent open   :    /C clutch           :
:                        :                        :    in IGN RUN circuit  :    engagement. If a    :
:                        :                        :    to cycling pressure :    concern is present  :
:                        :                        :    switch (if          :    that results in     :
:                        :                        :    applicable)         :    frequent A/C clutch :
:                        :                        :                        :    cycling, damage     :
:                        :                        :                        :    could occur if the  :
:                        :                        :                        :    torque converter    :
:                        :                        :                        :    was cycled at these :
:                        :                        :                        :    intervals. This     :
:                        :                        :                        :    test will detect    :
:                        :                        :                        :    this condition, set :
:                        :                        :                        :    the DTC and prevent :
:                        :                        :                        :    the torque          :
:                        :                        :                        :    converter from      :
:                        :                        :                        :    excessive cycling.  :
____________________________________________________________________________________________________

: P1474 - Low Fan        : Monitors the low fan   : *  Open or shorted LFC : -  When the LFC PID    :
: Control Primary        : control (LFC) (fan     :    /FC circuit         :    reads YES, a fault  :
: Circuit Failure        : control [FC] for one   : *  Open VPWR circuit   :    is currently        :
:                        : speed fan application) :    to low speed fan    :    present             :
:                        : primary circuit output :    relay               : -  An open circuit or  :
:                        : from the PCM. The test : *  Damaged fuel pump   :    short to ground can :
:                        : fails if: When the PCM :    relay (or CCRM)     :    only be detected    :
:                        : grounds the LFC/FC     : *  Damaged PCM         :    when the PCM is not :
:                        : circuit, excessive     :                        :    grounding the LFC   :
:                        : current draw is        :                        :    /FC circuit         :
:                        : detected on the LFC/FC :                        : -  A short to power    :
:                        : circuit; or with the   :                        :    can only be         :
:                        : LFC/FC circuit not     :                        :    detected when the   :
:                        : grounded by the PCM,   :                        :    PCM is grounding    :
:                        : voltage is not         :                        :    the LFC/FC circuit. :
:                        : detected on the LFC/FC :                        :    During KOEO and     :
:                        : circuit (the PCM       :                        :    KOER Self-Test, the :
:                        : expects to detect VPWR :                        :    LFC/FC circuit will :
:                        : voltage coming through :                        :    be cycled on and    :
:                        : the low speed fan      :                        :    off                 :
:                        : relay [or CCRM] coil   :
:                        : to the LFC/FC          :
:                        : circuit).              :
____________________________________________________________________________________________________

: P1474 - Hydraulic      : This test checks the   : *  HCF circuit open    : The HCF solenoid is    :
: Cooling Fan Primary    : electrical function of : *  HCF circuit short   : integrated in the HCF  :
: Circuit Failure (HCF)  : the (HCF) primary      :    to power            : pump which looks like  :
:                        : circuit. The test      : *  HCF circuit short   : a power steering pump. :
:                        : fails if: the PCM      :    to ground           : The electrical         :
:                        : detects voltage either : *  Damaged HCF         : resistance of the      :
:                        : too high or too low    :    solenoid            : solenoid windings is   :
:                        : when compared to the   : *  Damaged PCM         : nominally 10 ohms.     :
:                        : expected voltage range :
:                        : on the (HCF) primary   :
:                        : circuit.               :
____________________________________________________________________________________________________

: P1479 - High Fan       : Monitors the high fan  : *  Open or shorted HFC : -  When the HFC PID    :
: Control Primary        : control (HFC) primary  :    circuit             :    reads YES, a fault  :
: Circuit Failure        : circuit output from    : *  Open VPWR circuit   :    is currently        :
:                        : the PCM. The test      :    to high speed fan   :    present             :
:                        : fails if: With the HFC :    relay               : -  An open circuit or  :
:                        : output commanded on    : *  Damaged high speed  :    short to ground can :
:                        : (grounded), excessive  :    fan relay (or CCRM) :    only be detected    :
:                        : current draw is        : *  Damaged PCM         :    when the PCM is not :
:                        : detected on the HFC    :                        :    grounding the HFC   :
:                        : circuit; or with the   :                        :    circuit             :
:                        : HFC circuit commanded  :                        : -  A short to power    :
:                        : off, voltage is not    :                        :    can only be         :
:                        : detected on the HFC    :                        :    detected when the   :
:                        : circuit (the PCM       :                        :    PCM is grounding    :
:                        : expects to detect VPWR :                        :    the HFC circuit     :
:                        : voltage coming through :                        : -  During KOEO and     :
:                        : the high speed fan     :                        :    KOER self-test, the :
:                        : relay [or CCRM] coil   :                        :    HFC circuit will be :
:                        : to the HFC circuit).   :                        :    cycled on and off   :
____________________________________________________________________________________________________

: P1500 - Vehicle Speed  : Indicates the VSS      : *  Intermittent VSS    :
: Sensor (VSS)           : input signal was       :    connections         :
: Intermittent           : intermittent. This DTC : *  Intermittent open   :
:                        : is set when a VSS      :    in VSS harness      :
:                        : fault interferes with  :    circuit(s)          :
:                        : other OBDII tests,     : *  Intermittent short  :
:                        : such as Catalyst       :    in VSS harness      :
:                        : efficiency monitor,    :    circuit(s)          :
:                        : EVAP monitor, HO2S     : *  Damaged VSS         :
:                        : monitor, etc.          : *  Damaged PCM         :
____________________________________________________________________________________________________

: P1501 - Vehicle Speed  : Indicates the VSS      : *  Noisy VSS input     : Check for VSS input to :
: Sensor (VSS) Out of    : input signal is out of :    signal from Radio   : be 0 mph when vehicle  :
: Self Test Range        : Self Test range. If    :    Frequency           : transmission is in     :
:                        : the PCM detects a VSS  :    Interference/       : Park.                  :
:                        : input signal any time  :    Electro-Magnetic    :
:                        : during Self Test, a    :    Interference (RFI   :
:                        : DTC P1501 will be set  :    /EMI) external      :
:                        : and the test will      :    sources such as     :
:                        : abort.                 :    ignition wires,     :
:                        :                        :    charging circuit or :
:                        :                        :    after market        :
:                        :                        :    equipment.          :
____________________________________________________________________________________________________

: P1502 - Vehicle Speed  : Indicates the          : *  Refer to possible   : Refer to diagnostic    :
: Sensor (VSS)           : powertrain control     :    causes for P0500.   : aids for P0500.        :
: Intermittent           : module (PCM) detected  :
:                        : an error in the        :
:                        : vehicle speed          :
:                        : information. Vehicle   :
:                        : speed data is received :
:                        : from either the        :
:                        : vehicle speed sensor   :
:                        : (VSS), transfer case   :
:                        : speed sensor (TCSS),   :
:                        : anti-lock brake system :
:                        : (ABS) control module,  :
:                        : generic electronic     :
:                        : module (GEM), or       :
:                        : central timer module   :
:                        : (CTM). This DTC is set :
:                        : the same way as P0500. :
:                        : However, it is         :
:                        : intended to flash the  :
:                        : transmission control   :
:                        : indicator lamp (TCIL)  :
:                        : for first time VSS     :
:                        : circuit error          :
:                        : /malfunctions.         :
____________________________________________________________________________________________________

: P1502 - Vehicle Speed  : Indicates the          : Refer to possible      : Refer to diagnostic    :
: Sensor (VSS)           : powertrain control     : causes for P0500       : aides for P0500        :
: Intermittent (TCIL     : module (PCM) detected  :
: illuminates)           : an error in the        :
:                        : vehicle speed          :
:                        : information. Vehicle   :
:                        : speed data is received :
:                        : from either the        :
:                        : vehicle speed sensor   :
:                        : (VSS), anti-lock brake :
:                        : system (ABS) control   :
:                        : module, generic        :
:                        : electronic module      :
:                        : (GEM), or central      :
:                        : timer module (CTM).    :
:                        : This DTC is set the    :
:                        : same way as P0500.     :
:                        : However, it is         :
:                        : intended to flash the  :
:                        : transmission control   :
:                        : indicator lamp (TCIL)  :
:                        : for first time VSS     :
:                        : circuit error          :
:                        : /malfunctions.         :
____________________________________________________________________________________________________

: P1504 - Idle Air       : This DTC is set when   : *  IAC circuit open    : -  The IAC solenoid    :
: Control (IAC) Circuit  : the PCM detects an     : *  VPWR to IAC         :    resistance is from  :
: Malfunction            : electrical load        :    solenoid open       :    6 to 13 ohms.       :
:                        : failure on the IAC     : *  IAC circuit short   :   *  IAC valve stuck   :
:                        : output circuit.        :    to PWR              :      open              :
:                        :                        : *  IAC circuit short   :   *  Vacuum leaks      :
:                        :                        :    to GND              :   *  Failed EVAP       :
:                        :                        : *  Damaged IAC valve   :      system            :
:                        :                        : *  Damaged PCM         :   *  Damaged PCM       :
:                        :                        :                        : -  The IAC solenoid    :
:                        :                        :                        :    resistance is from  :
:                        :                        :                        :    6 to 13 ohms.       :
____________________________________________________________________________________________________

: P1506 - Idle Air       : This DTC is set when   : *  IAC circuit short   : Disconnect IAC valve   :
: Control (IAC)          : the PCM detects engine :    to GND              : and look for little or :
: Overspeed Error        : idle speed that is     : *  Damaged IAC valve   : no change in engine    :
:                        : greater than the       :                        : rpm as an indication   :
:                        : desired rpm.           :                        : of a stuck or damaged  :
:                        :                        :                        : valve.                 :
____________________________________________________________________________________________________

: P1507 - Idle Air       : This DTC is set when   : *  IAC circuit open    : -  The IAC solenoid    :
: Control (IAC)          : the PCM detects engine : *  IAC circuit short   :    resistance is from  :
: Underspeed Error       : idle speed that is     :    to PWR              :    6 to 13 ohms        :
:                        : less than the desired  : *  VPWR to IAC         : -  Disconnect IAC      :
:                        : rpm.                   :    solenoid open       :    valve and look for  :
:                        :                        : *  Air inlet is        :    no change in engine :
:                        :                        :    plugged             :    rpm as an           :
:                        :                        : *  Damaged IAC         :    indication of a     :
:                        :                        :    solenoid            :    stuck or damaged    :
:                        :                        : *  Damaged PCM         :    valve               :
____________________________________________________________________________________________________

: P1516 - Intake         :
: Manifold Runner        :
: Control Input Error    :
: (Bank 1)               :
____________________________________________________________________________________________________

: P1517 - Intake         : The IMRC system is     : *  Mechanical concern  : -  An IMRCM PID        :
: Manifold Runner        : monitored for failure  :    - bind, seize,      :    reading at closed   :
: Control Input Error    : during continuous or   :    damage or           :    throttle that is    :
: (Bank 2)               : key ON engine OFF self :    obstruction of IMRC :    less than VREF may  :
:                        : -test. Each DTC will   :    hardware            :    indicate a fault    :
:                        : distinguish the        :                        : -  An IMRCM PID        :
:                        : corresponding failed   :                        :    reading near 1 volt :
:                        : bank for IMRC actuator :                        :    or greater with     :
:                        : assemblies with dual   :                        :    engine rpm of at    :
:                        : monitor switches. The  :                        :    least 3000 may      :
:                        : test fails when the    :                        :    indicate a fault    :
:                        : signal on the monitor  :
:                        : pin is outside an      :
:                        : expected calibrated    :
:                        : range.                 :
____________________________________________________________________________________________________

: P1518 - Intake         : The IMRC system is     : *  IMRC monitor signal : An IMRCM PID reading   :
: Manifold Runner        : monitored for failure  :    circuit shorted to  : approximately near 1   :
: Control Malfunction    : during continuous, key :    PWR GND or SIG RTN  : volt at closed         :
: (Stuck Open)           : ON engine OFF or key   : *  Damaged IMRC        : throttle may indicate  :
:                        : ON engine running self :    actuator            : a fault                :
:                        : -test. The test fails  : *  Damaged PCM         :
:                        : when the signal on the :
:                        : monitor pin is less    :
:                        : than an expected       :
:                        : calibrated range at    :
:                        : closed throttle.       :
____________________________________________________________________________________________________

: P1519 - Inlet Manifold : The IMRC system is     : *  IMRC monitor        : An IMRCM PID reading   :
: Runner Control         : monitored for failure  :    circuit open        : at VREF with engine    :
: Malfunction (Stuck     : during continuous, key : *  IMRC control        : rpm of at least 3000   :
: Closed)                : ON engine OFF or key   :    circuit open        : may indicate a fault.  :
:                        : ON engine running self : *  IMRC monitor        :
:                        : -test. The test fails  :    circuit short to    :
:                        : when the signal on the :    VREF                :
:                        : monitor pin is more    : *  IMRC monitor return :
:                        : than an expected       :    circuit open        :
:                        : calibrated range with  : *  Damaged IMRC        :
:                        : IMRC activated.        :    actuator            :
:                        :                        : *  IMRC VPWR circuit   :
:                        :                        :    open                :
:                        :                        : *  Damaged PCM         :
____________________________________________________________________________________________________

: P1549 - Intake         : The IMCC or intake     : *  Open IMT valve      : -  An IMT valve fault  :
: Manifold Communication : manifold tuning (IMT)  :    circuit             : PID (IMTVF) displaying :
: Control Circuit        : valve system is        : *  Open VPWR circuit   : YES status may         :
: Malfunction            : monitored for failure  : *  Shorted IMT valve   : indicate a fault       :
:                        : during continuous or   :    circuit             : -  The DTC indicates   :
:                        : key ON engine OFF self : *  Damaged IMT valve   :       the PSP sensor   :
:                        : -test. The test fails  : *  Damaged PCM         :       is out of Self   :
:                        : when the PCM detects a : *  PSP sensor damaged  :       -Te              :
:                        : concern with IMT valve : *  Damaged PCM         :
:                        : output circuit.        :
____________________________________________________________________________________________________

: P1550 - Power Steering : The PSP sensor input   :
: Pressure (PSP) Sensor  : signal to PCM is       :
: Malfunction            : continuously           :
:                        : monitored. The test    :
:                        : fails when the signal  :
:                        : falls out of a maximum :
:                        : or minimum calibrated  :
:                        : range.                 :
____________________________________________________________________________________________________

: P1605 - Keep Alive     : Indicates the PCM has  : *  Reprogramming       : If KAPWR is            :
: Memory Test Failure    : experienced an         : *  Battery terminal    : interrupted to the PCM :
:                        : internal memory test   :    corrosion           : , because of a battery :
:                        : failure. However there : *  Damaged PCM         : or PCM disconnect, DTC :
:                        : are external items     : *  KAPWR to PCM        : can be generated on    :
:                        : that can cause this    :    interrupt/open      : the first power-up.    :
:                        : DTC.                   : *  Loose battery       :
:                        :                        :    connection          :
____________________________________________________________________________________________________

: P1633 - Keep Alive     : Indicates that the     : *  Open KAPWR circuit  :
: Power Voltage Too Low  : Keep Alive Power       : *  Damaged PCM         :
:                        : (KAPWR) circuit has    : *  Intermittent KAPWR  :
:                        : experienced a power    :    Circuit             :
:                        : interrupt.             :
____________________________________________________________________________________________________

: P1635 - Tire/Axle      : This Diagnostic        : *  Incorrect tire size : Using the scan tool,   :
: Ratio Out Of           : Trouble Code (DTC)     : *  Incorrect axle      : view the tire and axle :
: Acceptable Range       : indicates the tire and :    ratio               : parameters within the  :
:                        : axle information       : *  Incorrect VID       : VID. They must match   :
:                        : contained in Vehicle   :    configuration       : vehicle hardware.      :
:                        : ID block (VID) does    :    parameters          :
:                        : not match vehicle      :
:                        : hardware.              :
____________________________________________________________________________________________________

: P1640 - Powertrain     : Vehicles using a       : *  DTCs stored in a    : Call-up PID address    :
: DTC's Available in     : secondary Engine       :    secondary module,   : 0946 to determine      :
: Another Module         : Control Module can     :    which requested the : secondary module       :
:                        : request that the       :    MIL to be turned    : requesting MIL         :
:                        : Powertrain Control     :    on.                 : illumination. Once     :
:                        : Module illuminate the  :                        : secondary module is    :
:                        : Check Engine Light     :                        : determined request     :
:                        : when a failure occurs  :                        : DTCs from module.      :
:                        : which affect emission. :
____________________________________________________________________________________________________

: P1650 - Power Steering : In Key On, Engine Off  : *  Steering wheel must :
: Pressure (PSP) Switch  : Self-Test, this DTC    :    not be turned       :
: Malfunction            : indicates the PSP      :    during Key On,      :
:                        : input to the PCM is    :    Engine Running Self :
:                        : high. In Key On,       :    -Test               :
:                        : Engine Running Self    : *  PSP switch/shorting :
:                        : -Test, this DTC        :    bar damaged         :
:                        : indicates that the PSP : *  SIG RTN circuit     :
:                        : input did not change   :    open                :
:                        : state.                 : *  PSP circuit open or :
:                        :                        :    shorted to SIGRTN   :
:                        :                        : *  PCM damaged         :
____________________________________________________________________________________________________

: P1651 - Power Steering : The PCM counts the     : *  Vehicle towed with  : -  Check, if possible, :
: Pressure (PSP) Switch  : number of times        :    engine running      :    if vehicle was      :
: Signal Malfunction     : vehicle speed          : *  Power steering      :    towed or power      :
:                        : transitions from 0 to  :    hydraulic concern   :    steering service    :
:                        : a calibratable speed.  :    was repaired but    :    was performed.      :
:                        : After a calibratable   :    DTC was not erased  : -  Observe PSP V PID   :
:                        : number of speed        : *  PSP switch/shorting :    while checking      :
:                        : transitions the PCM    :    bar damaged         :    wires for           :
:                        : expects that the PSP   : *  SIG RTN circuit     :    intermittents.      :
:                        : input should have      :    open                :
:                        : changed. This DTC is   : *  PSP circuit open or :
:                        : set if the transition  :    shorted to SIGRTN   :
:                        : is not detected.       : *  PCM damaged         :
____________________________________________________________________________________________________

: P1703 - Brake Switch   : Indicates that during  : *  Open or short in    : Check for proper       :
: Out of Self-Test Range : Key On Engine Off      :    (BPP) circuit       : function of stoplamps. :
:                        : (KOEO) Self-Test, BPP  : *  Open or short in    : Follow correct Self    :
:                        : signal was high. Or    :    stoplamp circuits   : -Test procedures,      :
:                        : during Key On Engine   : *  Damaged PCM         : refer to Section 2     :
:                        : Running (KOER) Self    : *  Malfunction in      : Quick Test.            :
:                        : -Test, the BPP signal  :    module(s) connected :
:                        : did not cycle high and :    to BPP circuit      :
:                        : low.                   :    (Rear Electronic    :
:                        :                        :    Module [REM]        :
:                        :                        :    Windstar and LS6    :
:                        :                        :    /LS8 and Lighting   :
:                        :                        :    Control Module      :
:                        :                        :    (LCM) Continental   :
:                        :                        :    and Town Car)       :
:                        :                        : *  Damaged Brake       :
:                        :                        :    Switch              :
:                        :                        : *  Misadjusted Brake   :
:                        :                        :    Switch              :
____________________________________________________________________________________________________

: P1705 - Transmission   :
: Range Sensor Out of    :
: Self-Test Range        :
____________________________________________________________________________________________________

: P1709 - Park/Neutral   : The DTCs indicate that : *  PNP/CPP circuit     : When exercising either :
: Position Switch Out of : the voltage is high    :    short to PWR        : the PNP or CPP switch  :
: Self-Test Range        : when it should be low. : *  Damaged PNP or CPP  : the voltage should     :
:                        :                        :    switch              : cycle from 5.0V to low :
:                        :                        : *  PNP/CPP circuit     :
:                        :                        :    open in the SIGRTN  :
:                        :                        : *  Damaged PCM         :
____________________________________________________________________________________________________

: P1729 - 4x4L Switch    : The 4x4L switch is an  : *  4x4L harness open   : Verify the 4x4L switch :
: Malfunction            : ON/OFF. If the PCM     :    or shorted          : cycles ON/OFF.         :
:                        : does not see low       : *  Damaged electronic  :
:                        : voltage when the       :    shift module        :
:                        : switch is ON a DTC     : *  Damaged PCM         :
:                        : will set.              :
____________________________________________________________________________________________________

: P1780 - Transmission   : During KOER self-test  : *  TCS circuit short   : Verify the TCS switch  :
: Control Switch Out of  : the TCS has to be      :    or open             : cycles ON/OFF          :
: Self-Test Range        : cycled, if not cycled  : *  Damaged TCS switch  :
:                        : a DTC is set.          : *  Damaged PCM         :
____________________________________________________________________________________________________

: P1781 - 4x4L Switch    : The 4x4L switch is an  : *  4x4L harness open   : Verify the 4x4L switch :
: Out of Self-Test Range : ON/OFF. If the PCM     :    or shorted          : cycles ON/OFF          :
:                        : does not see low       : *  Damaged electronic  :
:                        : voltage when the       :    shift module        :
:                        : switch is on a DTC     : *  Damaged PCM         :
:                        : will set.              :
____________________________________________________________________________________________________

: P1900 - Output Shaft   : See DTC P0723          :
: Speed sensor circuit   :
: intermittent failure   :