| Various Models |
|---|
| 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 |
| 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 |
| P1221 (Model Year 1995) | Fuel pump, run signal -circuit malfunction | Wiring, engine oil pressure switch, fuel pump relay |
| P1221 (Model Years 2001-02) | Throttle motor position sensor 2 -circuit malfunction | Wiring, throttle control module |
| P1222 | Fuel pump, run signal – circuit malfunction | Wiring, engine oil pressure switch, fuel pump relay |
| P1258 | Engine overheating | Cooling system, ECT sensor |
| P1271 | Accelerator pedal position (APP) sensor 1/2 -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 |
| P1351 | Ignition control system, coil -voltage high | Wiring open circuit, ICM, ECM |
| P1361 | Ignition control system, ignition control (IC) circuit -voltage low | Wiring, circuit short circuit to ground, poor connections, 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 |
| 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, secondary -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 |
| P1481 | Engine coolant fan speed sensor – signal loss | Wiring, engine coolant fan speed sensor |
| P1482 | Engine coolant fan clutch solenoid – circuit malfunction | Wiring, engine coolant fan clutch solenoid, engine coolant fan clutch solenoid relay |
| P1484 | Engine coolant fan speed/engine speed – signal variation | Wiring, engine coolant fan clutch, engine coolant fan speed |
| 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 |
| P1512 | Throttle command/actual throttle position – signals out of range | Wiring, throttle valve sticking, throttle control module |
| 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 |
| P1520 | Park/neutral position (PNP) switch -circuit malfunction | Wiring short circuit to ground, PNP switch incorrectly adjusted |
| P1523 | Throttle control unit, throttle position during battery saving mode | Throttle valve movement restricted, throttle control unit, ECM |
| P1571 | Traction control system (TCS), torque request signal -malfunction | Wiring, poor connections, ABS/TCS |
| P1574 | Brake pedal position switch (BPP), voltage high | Wiring, ABS |
| 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 |
| P1626 | Engine control module (ECM) -fuel enable signal lost | Wiring, poor connections, immobilizer control module, ECM |
| P1627 | Engine control module (ECM) -malfunction | 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 (Model Year 1995) | Engine control module (ECM) -fuel disable signal received | Fuses, SCM, immobilizer code |
| P1632 (Model Years 1998-2002) | 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 |
| P1644 | Traction control system (TCS), delivered torque signal -malfunction | Wiring, poor connections, 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 |
| P1779 | Engine control module (ECM), torque reduction signal – out of range | Wiring TCM, 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 |
| P1812 | transmission fluid temperature (TFT) – high | Tramsmission mechanical fault, towing weight limit exceeded |
| P1860 | Torque converter clutch (TCC) solenoid, pulse width modulation (PWM) -circuit malfunction | Wiring open circuit/short circuit to ground, TCC solenoid, ECM |
| P1864 | Torque converter clutch (TCC) solenoid – 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 |
| P1886 | Transmission 3rd-2nd control solenoid – circuit malfunction | Wiring, control solenoid, 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 |
