| 96-00 7.4L VIN J |
|---|
| Scan Code | Fault Location | Probable Cause |
| POOOO-P0999 | Refer to OBD-II trouble code table | – |
| P1106 | Manifold absolute pressure (MAP) sensor -voltage high, intermittent | Wiring open circuit/short circuit to positive, poor connections |
| P1107 | Manifold absolute pressure (MAP) sensor -voltage low, intermittent | Wiring short circuit to ground, poor connections |
| P1111 | Intake air temperature (IAT) sensor -voltage high, intermittent | Wiring open circuit/short to positive, poor connections |
| P1112 | Intake air temperature (IAT) sensor -voltage low, intermittent | Wiring short circuit to ground |
| P1114 | Engine coolant temperature (ECT) sensor -voltage low, intermittent | Wiring short circuit to ground, poor connections , |
| P1115 | Engine coolant temperature (ECT) sensor -voltage high, intermittent | Wiring open circuit/short to positive, poor connections |
| P1120 | Throttle motor position sensor 1 -circuit malfunction | Wiring, throttle control module |
| P1121 | Throttle position (TP) sensor -voltage high, intermittent | Wiring open circuit/short to positive, poor connections |
| P1122 | Throttle position (TP) sensor -voltage low, intermittent | Wiring open circuit/short to ground, poor connections |
| P1125 | Accelerator pedal position (APP) sensor 1/2/ 3 -signal malfunction | Wiring, APP sensor, ECM |
| P1133 | Oxygen sensor (02S)/heated oxygen sensor (H02S) 1, bank 1 -insufficient SWitching | Wiring, exhaust system leaking, 02S/H02S |
| P1134 | Heated oxygen sensor (H02S) 1, bank 1 -slow response | Wiring, oxygen sensor heater, exhaust system leaking, H02S |
| P1137 | Heated oxygen sensor (H02S) 2, bank 1 -voltage low | Wiring, exhaust system leaking, H02S |
| P1138 | Heated oxygen sensor (H02S) 2, bank 1 -voltage high | Wiring, H02S |
| P1153 | Heated oxygen sensor (H02S) 1, bank 2 -insufficient switching | Wiring, oxygen sensor heater, exhaust system leaking, H02S |
| P1154 | Heated oxygen sensor (H02S) 1, bank 2 -slow response | Wiring, oxygen sensor heater, exhaust system leaking, H02S |
| P1158 | Heated oxygen sensor (H02S) 2, bank 2 -not switching, fuel trim (FT) rich mixture | Wiring, exhaust system leaking, H02S |
| P1171 | Fuel system -lean during acceleration | Fuel filter, fuel pump, H02S, injectors |
| P1172 | Fuel level sensors, primary and secondary -no fuel level change during fuel transfer from secondary to primary tank | Wiring, fuel pump relays, secondary fuel pump, fuel level sensors, ECM |
| P1187 | Engine oil temperature (EOT) sensor -voltage low | Wiring open circuit/short circuit to ground, EOT sensor, ECM |
| P1188 | Engine oil temperature (EOT) sensor -voltage high | Wiring open circuit/short circuit to positive, EOT sensor, ECM |
| P1220 | Throttle motor position sensor 2 -circuit malfunction | Wiring, throttle control module |
| P1221 | Throttle motor position sensor 1/2 -signal variation | Wiring, throttle control module |
| P1222 | Injector control, circuit monitor -malfunction | Injector, Wiring |
| P1250 | Intake manifold heater -circuit malfunction | Wiring, intake manifold heater, intake manifold heater relay |
| P1258 | Engine overheating | Cooling system, ECT sensor |
| P1271 | Accelerator pedal position (APP) sensor 1/2 -signal variation | Wiring, APP sensor, ECM |
| P1272 | Accelerator pedal position (APP) sensor 2/3 -signal variation | Wiring, APP sensor, ECM |
| P1273 | Accelerator pedal position (APP) sensor 1/3 -signal variation | Wiring, APP sensor, ECM |
| P1275 | Accelerator pedal position (APP) sensor 1 -circuit malfunction | Wiring, APP sensor, ECM |
| P1276 | Accelerator pedal position (APP) sensor 1 -range performance | Wiring, APP sensor, ECM |
| P1280 | Accelerator pedal position (APP) sensor 2 -circuit malfunction | Wiring, APP sensor, ECM |
| P1281 | Accelerator pedal position (APP) sensor 2 -range performance | Wiring, APP sensor, ECM |
| P1285 | Accelerator pedal position (APP) sensor 3 -circuit malfunction | Wiring, APP sensor, ECM |
| P1286 | Accelerator pedal position (APP) sensor 3 -range performance | Wiring, APP sensor, ECM |
| P1336 | Crankshaft position sensor (CKP) -variation not learned | Learning procedure not performed |
| P1345 | Crankshaft position sensor (CKP)/camshaft position sensor (CMP) -signal variation | CKP sensor, distributor/camshaft alignment, mechanical fault |
| P1350 | Ignition control system, bypass circuit -circuit malfunction | Wiring, poor connections, ICM, ECM |
| P1351 | Ignition control system, coil -voltage high | Wiring open circuit, ICM, ECM |
| P1352 | Ignition control system, bypass circuit -voltage high | Wiring open circuit, ICM, ECM |
| P1361 | Ignition control system, ignition control (Ie) circuit -voltage low | Wiring, circuit short circuit to ground, poor connections, ICM, ECM |
| P1362 | Ignition control, bypass circuit -voltage low | Wiring short circuit to ground, ICM, ECM |
| P1371 | Ignition control reference signal, low/high resolution -low signal lost | Wiring,ICM |
| P1374 | Crankshaft position sensor (CKP), high to low resolution frequency -signal variation | Wiring, wiring routed near spark plug wires, ignition coils arcing/tracking, ICM, ECM |
| P1380 | Antilock brake system (ABS)/traction control system (TCS), rough road signal to engine control module (ECM) -malfunction | ABS trouble code(s) stored |
| P1381 | Antilock brake system (ABS)/traction control system (TCS), rough road signal to engine control module (ECM) -no communication | Wiring, poor connections, ABS |
| P1404 | Exhaust gas recirculation (EGR) valve -not fully closing | Wiring, poor connections, EGR valve position sensor, EGR solenoid |
| P1406 | Exhaust gas recirculation (EGR) valve position sensor -range performance | Wiring, EGR valve tight/sticking, EGR valve position sensor |
| P1408 | Manifold absolute pressure (MAP) sensor -voltage out range | Wiring, poor connections, MAP sensor, ECM |
| P1410 | Evaporative emission (EVAP) canister purge valve -circuit malfunction | Wiring, poor connectios, EVAP canister vent valve, ECM |
| P1415 | Secondary air injection (AIR) system, bank 1 | Wiring, hoses blocked/leaking, AIR valve |
| P1416 | Secondary air injection (AIR) system, bank 2 | Wiring, hoses blocked/leaking, AIR valve |
| P1431 | Fuel level sensor -circuit malfunction | Wiring, fuel level sensor |
| P1432 | Fuel level sensor -low voltage | Wiring open circuit, fuel level sensor |
| P1433 | Fuel level sensor -voltage high | Wiring short circuit to positive, fuel level sensor |
| P1441 | Evaporative emission (EVAP) system -leak detected | Hose connection(s), EVAP canister, EVAP canister purge valve |
| P1442 | Evaporative emission (EVAP) system vacuum switch -circuit malfunction | Hoses blocked/leaking, wiring, EVAP canister, ECM |
| P1450 | Barometric pressure (BARO) sensor -voltage out of range | Wiring, BARO sensor, ECM |
| P1451 | Barometric pressure (BARO) sensor -performance range | Wiring, poor connections, BARO sensor, ECM |
| P1500 | Ignition switch, cranking signal/ system voltage -circuit malfunction | Wiring, poor connections, ECM |
| P1504 | Engine control module (ECM), vehicle speed sensor (VSS) output signal -circuit malfunction | Wiring, poor connections, ABS, ECM |
| P1508 | Idle air control (lAC) valve -low rpm | Wiring open circuit/short circuit to ground/ short circuit to positive, lAC valve, throttle valve tight/sticking |
| P1509 | Idle air control (lAC) valve -high rpm | Wiring open circuit/short circuit to ground/ short circuit to positive, lAC valve, throttle valve tight/sticking |
| P1510 | Engine control module (ECM), KAM supply voltage -circuit malfunction | Wiring, poor connections, ECM |
| P1514 | Throttle control unit, intake air flow -excessive | Throttle control unit, MAP sensor, CMP sensor signal, ECM |
| P1515 | Throttle command/actual throttle position -signal variation | Wiring, throttle valve sticking, throttle control module |
| P1516 | Throttle command/actual throttle position -signal variation | Wiring, throttle valve sticking, throttle control module |
| P1517 | Throttle control module -malfunction | Throttle control module |
| P1518 | Throttle control module/engine control module (ECM) -communication malfunction | Wiring, throttle control module, ECM |
| P1519 | Throttle motor position sensor 1 -signal malfunction | Throttle control module |
| P1520 | Park/neutral position (PNP) switch -circuit malfunction | Wiring short circuit to ground, PNP switch incorrectly adjusted |
| P1523 | Throttle control unit, closed throttle position -performance | Throttle valve movement restricted, throttls control unit |
| P1530 | Ignition timing adjustment connector | Wiring short circuit to ground, connector short to ground |
| P1532 | A/C refrigerant temperature sensor -voltage low | Wiring open circuit/short circuit to ground, A/C refrigerant temperature sensor, ECM |
| P1533 | A/C refrigerant temperature sensor -voltage high | Wiring open circuit/short circuit to ground, A/C refrigerant temperature sensor, ECM |
| P1539 | A/C compressor clutch relay -voltage high | Wiring, A/C compressor clutch relay, ECM |
| P1543 | A/C system -performance | Refrigerant low, wiring, A/C refrigerant pressure sensor, A/C evaporator temperature sensor, ECM |
| P1545 | A/C compressor clutch relay -voltage low | Wiring, A/C compressor clutch relay, ECM |
| P1546 | A/C compressor clutch relay -circuit malfunction | Wiring, A/C compressor clutch relay, ECM |
| P1554 | Cruise control status circuit -high voltage | Wiring open circuit/short circuit to ground, cruise control module, ECM |
| P1571 | Traction control system (TCS), torque request signal -malfunction | Wiring, poor connections, ABS/TCS |
| P1572 | Traction control system (TCS), active signal -malfunction | Wiring short to ground, ABS/TCS, ECM |
| P1574 | Brake pedal position switch (BPP), voltage high | Wiring, ABS |
| P1575 | Brake pedal position switch (BPP), extended travel contacts -voltage high | Wiring, ABS |
| P1586 | Cruise control system, brake switch 2 -circuit malfunction | Wiring, poor connections, BPP switch |
| P1600 | Engine control module (ECM) -malfunction | ECM |
| P1601 | CAN data bus, engine control module (ECM)I antilock brake system (ABS)/traction control system (TCS)/instrumentation control modulel diagnostic control module -some communication lost | Wiring, poor connections, ECM, ABSITCS, diagnostic control module, instrumentation control module |
| P1602 | Engine control module (ECM) to antilock brake system (ABS)/traction control system (TCS), CAN data bus -communication failure | Wiring, poor connections, ABS control module |
| P1621 | Engine control module (ECM) -malfunction | ECM |
| P1624 | Engine control module (ECM) -memory performance | ECM |
| P1626 | Engine control module (ECM) -fuel enable signal lost | Wiring, poor connections, immobilizer control module, ECM |
| P1627 | Engine control module (ECM) -malfunction | ECM |
| P1629 | Engine control module (ECM) -fuel enable signal not received | Incorrect ignition key, wiring, poor connections, immobilizer control module, ECM |
| P1630 | Engine control module (ECM), immobilizer code -learning mode | ECM immobilizer code programming not completed |
| P1631 | Engine control module (ECM) -incorrect immobilizer code | Incorrect key, immobilizer code not programmed |
| P1632 | Engine control module (ECM) -fuel disable signal received | Fuses, SCM, immobilizer code |
| P1635 | Engine control module (ECM), sensor supply voltage -circuit malfunction | Wiring, poor connections, TP sensor, MAP sensor, EGR valve position sensor, FTP sensor, ECM |
| P1637 | Alternator ‘L’ terminal -circuit malfunction | Wiring open circuit/short circuit to ground, alternator, battery temperature sensor, ECM |
| P1638 | Alternator ‘F’ terminal -circuit malfunction | Wiring open circuit/short circuit to ground, alternator, ECM |
| P1639 | Engine control module (ECM), sensor supply voltage -circuit malfunction | Wiring, poor connections, fuel tank level sensor, ECM |
| P1639 (Express) | Engine control module (ECM), sensor supply voltage -circuit malfunction | Wiring, poor connections, FTP sensor, ECM |
| P1641 | Engine coolant blower motor relay 1 -circuit malfunction | Wiring, engine coolant blower motor relay, ECM |
| P1642 | Engine coolant blower motor relay 2 & 3 -circuit malfunction | Wiring, engine coolant blower motor relay(s), ECM |
| P1643 | Engine speed (RPM), engine control module (ECM) output signal -circuit malfunction | Wiring, tachometer, ECM |
| P1644 | Traction control system (TCS), delivered torque signal -malfunction | Wiring, poor connections, ECM |
| P1651 | Engine coolant blower motor relay 1 -circuit malfunction | Wiring, engine coolant blower motor relay, ECM |
| P1652 (1996) | Engine control module(ECM), vehicle speed sensor (VSS) output signal -circuit malfunction | Wiring, poor connections, ECM |
| P1652 (1997-2000) | Engine control module (ECM), firm suspension request signal -circuit malfunction | Wiring, .poor connections, suspension control module, ECM |
| P1653 | Fuel gauge, control signal -circuit malfunction | Wiring, ECM |
| P1654 | NC compressor clutch relay -circuit malfunction | Wiring open circuit/short circuit to ground, AlC compressor clutch relay, ECM |
| P1655 | Evaporative emission (EVAP) canister purge valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister vent valve, ECM |
| P1657 | Skip shift solenoid -circuit malfunction | Wiring, skip shift solenoid, ECM |
| P1661 | Malfunction indicator lamp (MIL) -circuit malfunction | Wiring, MIL, ECM |
| P1662 | Cruise control, inhibit output circuit -malfunction | Wiring open circuit/short circuit to ground, cru.ise control motor/actuator, cruise control module, ECM |
| P1663 | Alternator warning lamp, control signal -circuit malfunction | Wiring, instrument panel, ECM |
| P1664 | Skip shift warning lamp-circuit malfunction | Wiring, skip shift warning lamp, ECM |
| P1665 | Evaporative emission (EVAP) canister vent valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister vent valve, ECM |
| P1667 | Reverse inhibit solenoid -circuit malfunction | Wiring, reverse inhibit solenoid, ECM |
| P1671 | Malfunction indicator lamp (MIL) -circuit malfunction | Wiring open circuit/short circuit to ground/ short circuit to positive, MIL, ECM |
| P1672 | Engine oil level ‘low’ warning lamp, control signal -circuit malfunction | Wiring short circuit to ground, engine oil level, ECM |
| P1676 | Evaporative emission (EVAP) canister purge valve -circuit malfunction | Wiring open circuit/short circuit to ground, EVAP canister purge valve, ECM |
| P1680 | Engine control module (ECM) -malfunction | ECM |
| P1681 | Engine control module (ECM) -malfunction | ECM |
| P1683 | Engine control module (ECM) -malfunction | ECM |
| P1689 | Traction control system (TCS), delivered torque signal -malfunction | Wiring, poor connections, ECM |
| P1740 | Cruise control system, overdrive disable signal -voltage low | Wiring short to ground, ECM |
| P1781 | Transmission control module (TCM), malfunction indicator lamp (MIL) request signal -voltage high/low | Wiring TCM, ECM |
| P1810 | Transmission gear pressure switch, signal -circuit malfunction | Wiring open circuit/short circuit to ground, reverse/D1/D2/D3/D4 gear pressure switch(es), ECM |
| P1860 | Torque converter clutch (TCC) solenoid, pulse width modulation (PWM) -circuit malfunction | Wiring open circuit/short circuit to ground, TCC solenoid, ECM |
| P1870 | Torque converter clutch (TCC) -slip speed excessive | Transmission fluid level, wiring, TCC solenoid, ECM |
| P1875 | Transmission, 4WD low selection signal circuit malfunction | Wiring, transmission, four wheel drive control module, ECM |
| U1000 | CAN data bus -communication malfunction | Wiring, BCM, ECM, instrumentation control module, SOM |
| U1026 | Transmission control module (TCM)/four wheel drive control module, CAN data bus communication malfunction | Wiring, BCM |
| U1041 | Antilock brake system (ABS)/traction control system (TCS), CAN data bus communication malfunction | Wiring, ABS/TCS trouble codes stored |
| U1064 | Body control module (BCM), CAN data bus communication malfunction | Wiring, BCM |
| U1192 | Engine control module (ECM)/immobilizer control module, CAN data bus -signal malfunction | Wiring, immobilizer control module, ECM |
| U1193 | Engine control module (ECM)/immobilizer control module, CAN data bus -signal malfunction | Wiring, immobilizer control module, ECM |
| U1300 | CAN data bus -signal low | Wiring |
| U1301 | CAN data bus -signal high | Wiring |
