| Scan code | Fault location | Probable cause |
| PO, P2,UO | Refer to OBD-II trouble code tables | – |
| P1101 | Intake air flow -incorrect | Wiring, mechanical fault, engine coolanttemperature (ECT) sensor, barometric pressure (BARO) sensor, intake air temperature (IAT) sensor, manifold absolute pressure (MAP) sensor, mass air flow (MAF) sensor, throttle position (TP) switch |
| P1106 | Manifold absolute pressure (MAP) sensorvoltage high, intermittent | Wiring open circuit/short circuit to positive, poor connections |
| P1107 | Manifold absolute pressure (MAP) sensorvoltage 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) sensorvoltage low, intermittent | Wiring short circuit to ground, poor connections |
| P1115 | Engine coolant temperature (ECT) sensorvoltage high, intermittent | Wiring open circuit/short to positive, poor connections |
| P1120 | Throttle motor position sensor 1 -circuitmalfunction | 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 1/2/3signal 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, H025 |
| P1138 | Heated oxygen sensor (H02S) 2, bank 1 voltagehigh | Wiring, H025 |
| P1153 | Heated oxygen sensor (H02S) 1, bank 2insufficient switching | Wiring, oxygen sensor heater, exhaust systemleaking, H025 |
| P1154 | Heated oxygen sensor (H02S) 1, bank 2slow response | Wiring, oxygen sensor heater, exhaust system leaking, H02S |
| P1171 | Fuel system -lean during acceleration | Fuel filter, fuel pump, H025, injectors |
| P1189 | Engine oil pressure warning lamp switch -circuit malfunction | Wiring, engine oil pressure warning lamp switch |
| P1200 | Injectors -circuit malfunction | Wiring open circuit/short circuit to ground/short circuit to positive, injectors, 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 |
| P1258 | Engine overheating | Cooling system, engine coolant temperature (ECT) sensor |
| P1260 | Fuel pump, control signal -circuit malfunction | Wiring, fuel pump control module, ECM |
| P1271 | Accelerator pedal position (APP) sensor 1/2signal variation | Wiring, APP sensor, ECM |
| P1272 | Accelerator pedal position (APP) sensor 2/3signal variation | Wiring, APP sensor, ECM |
| P1273 | Accelerator pedal position (APP) sensor 1/3signal variation | Wiring, APP sensor, ECM |
| P1275 | Accelerator pedal position (APP) sensor 1 circuitmalfunction | Wiring, APP sensor, ECM |
| P1276 | Accelerator pedal position (APP) sensor 1 rangeperformance | Wiring, APP sensor, ECM |
| P1280 | Accelerator pedal position (APP) sensor 2 circuitmalfunction | Wiring, APP sensor, ECM |
| P1281 | Accelerator pedal position (APP) sensor 2 range performance | Wiring, APP sensor, ECM |
| P1285 | Accelerator pedal position (APP) sensor 3 circuitmalfunction | Wiring, APP sensor, ECM |
| P1286 | Accelerator pedal position (APP) sensor 3 range performance | Wiring, APP sensor, ECM |
| P1336 | Crankshaft position (CKP) sensor -variation not learned | Learning procedure not performed |
| P1350 | Ignition control system, bypass circuit -circuitmalfunction | Wiring, poor connections, ICM, ECM |
| P1351 | Ignition control system, coil -voltage high | Wiring open circuit, ICM, ECM |
| P1352 | Ignition control system, bypass circuit voltagehigh | Wiring open circuit, ICM, ECM |
| P1361 | Ignition control system, IC 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 (CKP) sensor, high to lowresolution frequency -signal variation | Wiring, wiring routed near spark plug wires, ignition coils arcing/tracking, ICM, ECM |
| P1380 | Antilock brake system (ABS)/traction controlsystem (TCS), rough road signal to ECM -malfunction | ASS trouble coders) stored |
| P1381 | Antilock brake system (ABS)/traction controlsystem (TCS), rough road signal to ECM -nocommunication | Wiring, poor connections, ASS |
| P1400 | Cold start emission control -malfunction | Intake/exhaust leak/blockage, mechanical fault,idle speed control (ISC) system, ignition control,engine coolant temperature (ECT) sensor, H02S |
| P1404 | Exhaust gas recirculation (EGR) valve -not fullyclosing | Wiring, poor connections, EGR valve position sensor, EGR solenoid |
| P1406 | Exhaust gas recirculation (EGR) valve positionsensor 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 |
| P1441 | Evaporative emission (EVAP) system -leak detected | Hose connection(s), EVAP canister, EVAP canister purge valve |
| P1442 | Evaporative emission (EVAP) system vacuumswitch -circuit malfunction | Hoses blocked/leaking, wiring, EVAP canister, ECM |
| P1483 | Engine cooling system -performance | Cooling system, engine coolant temperature(ECT) sensor, intake air temperature (IAT) sensor |
| 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 |
| P1514 | Throttle control unit, intake air flow -excessive | Throttle control unit, MAP sensor, CMP sensorsignal, ECM |
| P1515 | Throttle command/actual throttle position -signalvariation | 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/ECM -communicationmalfunction | Wiring, throttle control module, ECM |
| P1519 | Throttle motor position sensor 1 -signalmalfunction | Throttle control module |
| P1523 | Throttle control unit, closed throttle position -performance | Throttle valve movement restricted, throttle control unit |
| P1532 | AlC refrigerant temperature sensor -voltage low | Wiring open circuit/short circuit to ground, AlC refrigerant temperature sensor, ECM |
| P1533 | AlC refrigerant temperature sensor -voltage high | Wiring open circuit/short circuit to ground, AlC refrigerant temperature sensor, ECM |
| P1539 | AlC compressor clutch relay -voltage high | Wiring, AlC compressor clutch relay, ECM |
| P1543 | AlC system -performance | Refrigerant low, wiring, AlC refrigerant pressure sensor, AlC evaporator temperature sensor, ECM |
| P1545 | AlC compressor clutch relay -voltage low | Wiring, AlC compressor clutch relay, ECM |
| P1546 | AlC compressor clutch relay -circuit malfunction | Wiring, AlC 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, ABSITCS |
| P1572 | Traction control system (TCS), active signal malfunction | Wiring short to ground, ABSITCS, ECM |
| P1573 | Engine control module (ECM), antilock brakesystem (ABS)/traction control system (TCS)communication -malfunction | Wiring, poor connections, ABS control module, ECM |
| P1574 | Brake pedal position (BPP) switch, voltage high | Wiring, ABS |
| P1585 | Cruise control system, inhibit output circuit | Wiring, poor connections, cruise control motor/actuator, ECM |
| P1586 | Cruise control system, brake switch 2 -circuit malfunction | Wiring, poor connections, BPP switch |
| P1600 | Engine control module (ECM) -malfunction | Engine control module (ECM) |
| P1601 | CAN data bus, engine control module(ECM)/antilock brake system (ABS)/traction control system (TCS)/instrumentation control module/diagnostic control module -not allmodules communicating | Wiring, poor connections, ECM, ABSITCS, diagnostic control module, instrumentation control module |
| P1621 | 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 | Engine control module (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 leaming 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 signalreceived | Fuses, SCM, immobilizer code |
| P1635 | Engine control module (ECM). sensor supplyvoltage -circuit malfunction | Wiring, poor connections, TP sensor, MAP sensor, EGR valve position sensor, fuel tank pressure (FTP) sensor, ECM |
| P1637 | Alternator warning lamp, control signal -circuitmalfunction | Wiring, instrument panel, ECM |
| P1639 | Engine control module (ECM), sensor supplyvoltage -circuit malfunction | Wiring, poor connections, AlC refrigerant pressure sensor, ECM |
| P1640 | Engine control module (ECM), quad driver/output driver -circuit malfunction | Wiring, ECM controlled components, ECM III |
| P1641 0 | Malfunction indicator lamp (MIL) -circuit malfunction | Wiring, poor connections, MIL, ECM |
| P1641 f) | AlC compressor clutch relay -circuit malfunction | Wiring open circuit/short circuit to ground, AlC compressor clutch relay, ECM |
| P1641 D | Engine coolant blower motor relay 1 -circuitmalfunction | Wiring, engine coolant blower motor relay, ECM |
| P1642 D | Engine coolant blower motor relay 2 & 3 circuitmalfunction | Wiring, engine coolant blower motor relay(s), ECM |
| P1642 9 | Engine oil change warning lamp -circuit malfunction | Wiring, ECM |
| P1642 III | Secondary air injection (AIR) pump relay circuit malfunction | Wiring, AIR pump relay, ECM |
| P1643 D | Engine speed (RPM), engine control module (ECM)output signal -circuit malfunction | Wiring, tachometer, ECM |
| P1643 9 | Fuel pump, control signal -circuit malfunction | Wiring, fuel pump control module, ECM |
| P1644 | Traction control system (TCS), delivered torque signal -malfunction | Wiring, poor connections, ECM |
| P1645 | Supercharger (SC) bypass valve, control signal -circuit malfunction | Wiring, SC bypass valve, ECM |
| P1650 | Engine control module (ECM), quad driver/output driver -circuit malfunction | Wiring, ECM controlled components, ECM III |
| P1651 | Engine coolant blower motor relay 1 -circuitmalfunction | Wiring, engine coolant blower motor relay, ECM |
| P1652 D | Engine control module (ECM), vehicle speedsensor (VSS) output signal -circuit malfunction | Wiring, poor connections, ECM |
| P1652 9 | Engine coolant blower motor relay 2 & 3 circuit malfunction | Wiring, engine coolant blower motor relay(s), ECM |
| P1653 ~ | Fuel gauge, control signal -circuit malfunction | Wiring, ECM |
| P1653 0 | Engine oil level ‘low’ warning lamp, control signal -circuit malfunction | Wiring short circuit to ground, ECM |
| P1653 EJ | Traction control system (TCS), delivered torque signal -malfunction | Wiring, poor connections, ECM |
| P1654 | AlC 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 |
| P1660 | Engine control module (ECM), quad driver/output driver -circuit malfunction | Wiring, ECM controiled components, ECM liJ |
| P1661 | Malfunction indicator lamp (MIL) -circuit malfunction | Wiring, MIL, ECM |
| P1662 | Cruise control, inhibit output circuit malfunction | Wiring open circuit/short circuit to ground, cruise 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 D | Reverse inhibit solenoid -circuit malfunction | Wiring, reverse inhibit solenoid, ECM |
| P1667 a | Fuel pump, control signal -circuit malfunction | Wiring, fuel pump control module, ECM |
| P1668 | Alternator ‘L’ terminal -circuit malfunction | Wiring, voltage regulator, alternator, ECM |
| P1670 | Engine control module (ECM), quad driver/output driver -circuit malfunction | Wiring, ECM controlled components, ECM liJ |
| 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 |
| P1673 | Engine coolant ‘hot’ warning lamp, control signal -circuit malfunction | Wiring, instrument panel, cooling system, 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 | Engine control module (ECM) |
| P1681 | Engine control module (ECM) -malfunction | Engine control module (ECM) |
| P1682 | Engine control module (ECM) -ignition power supply less than 10 V | Wiring, ECM |
| P1683 | Engine control module (ECM) -malfunction | Engine control module (ECM) |
| P1689 | Traction control system (TCS), delivered torque signal -malfunction | Wiring, poor connections, ECM |
| P1750 | Torque converter clutch (TCC)solenoid/transmission shift control valve/transmission pressure control solenoid -circuit malfunction | Wiring, TCC solenoid/transmission shift control valve/transmission pressure control solenoid, TCM, ECM |
| P1810 | Transmission fluid pressure (TFP) switch -manual valve position | Fluid level low, wiring, selector lever linkageincorrectly adjusted, ECM |
| P1811 | Shift time too long -adaptation limit reached | Fluid level low, transmission mechanical fault |
| P1814 | Torque converter clutch (TCC) -over-stressed | Fluid level low, fluid condition, transmission mechanical fault |
| P1815 | Transmission fluid pressure (TFP) switch -invalidgear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM |
| P1816 | Transmission fluid pressure (TFP) switch-invalidgear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM |
| P1817 | Transmission fluid pressure (TFP) switch -invalidgear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM |
| P1818 | Transmission fluid pressure (TFP) switch -invalidgear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECM |
| P1819 | Transmission range (TR) switch, signals ‘AIS/C &P’ -signal variation | Wiring, TR switch |
| P1820 | Transmission range (TR) switch, signal ‘A’ voltage low | Wiring short to ground, TR switch |
| P1822 | Transmission range (TR) switch, signal’S’ voltage high | Wiring, TR switch |
| P1823 | Transmission range (TR) switch, signal ‘P’ voltage low | Wiring short to ground, TR switch |
| P1825 | Transmission range (TR) switch, signals ‘AIS/C &P’ incorrect signal | Wiring, TR switch |
| P1826 | Transmission range (TR) switch, signal ‘C’voltage high | Wiring, TR switch |
| P1860 | Torque converter clutch (TCC) solenoid -circuitmalfunction | 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 |
| P1887 | Torque converter clutch (TCC) release switch -circuit malfunction | Wiring open circuit, TCC solenoid release switch, ECM |
| P1915 | Transmission range (TR) switch, signals ‘AIS/C &P’ -incorrect signal, while cranking | Wiring, TR switch |
| P3401 | Cylinder cut-out solenoid, cylinder 1 malfunction | Wiring, cylinder cut-out solenoid, mechanical fault, ECM |
| P3425 | Cylinder cut-out solenoid, cylinder 4 malfunction | Wiring, cylinder cut-out solenoid, mechanical fault, ECM |
| P3441 | Cylinder cut-out solenoid, cylinder 6 malfunction | Wiring, cylinder cut-out solenoid, mechanical fault, ECM |
| P3449 | Cylinder cut-out solenoid, cylinder 7 malfunction | Wiring, cylinder cut-out solenoid, mechanical fault, ECM |
| U1000 | CAN data bus -communication malfunction | Wiring, BCM, ECM, ABS/TCS, instrumentation control module, SOM |
| U1001 | CAN data bus -loss of serial communication | Wiring, BCM, ECM, instrumentation controlmodule, SOM |
| U1016 | CAN data bus, engine control module(ECM)/antilock brake system (ABS)/traction control system (TCS)/instrumentation controlmodule/diagnostic control module -loss of serialcommunication | Wiring, poor connections, ECM, ABS/TCS, diagnostic control module, instrumentation control module |
| U1254 | CAN data bus -loss of serial communication | Wiring, BCM, ECM, instrumentation control module, SOM |
| U1255 | CAN data bus -communication malfunction | Wiring, BCM, ECM, ABS/TCS, instrumentation control module, SOM |
| U1300 | CAN data bus -signal low | Wiring |
| U1301 | CAN data bus -signal high | Wiring |
| U1304 | CAN data bus -communication malfunction withABSITCS | Wiring, ABS/TCS, ECM |
| U1305 | CAN data bus -signal high or low | Wiring |
| U1500 | Vehicle communication interface module (VCIM)-malfunction | VCIM |
| U1650 | CAN data bus -communication malfunction withABSfTCS | Wiring, steering angle sensor, ABS/TCS |
| U1651 | CAN data bus -communication malfunction withABSITCS | Wiring, steering angle sensor, ABS/TCS |
