| OBD-11 code | Fault location | Probable cause |
| PO,P2,UO | Refer to 080-11 trouble code tables | – |
| P1020 1 | Variable valve timing control – performance problem | Wiring, engine oil pressure switch, valve timing control valve, actuator, ECM |
| P1020 2 | Variable valve timing control, bank 1 – performance problem | Wiring, engine oil pressure switch, valve timing control valve, actuator, ECM |
| P1021 1 | Valve timing control valve – circuit malfunction | Wiring, valve timing control valve, ECM |
| P1021 2 | Valve timing control valve, bank 1 -circuit malfunction | Wiring, valve timing control valve, ECM |
| P1022 | Variable valve timing control, bank 2 – performance problem | Wiring, engine oil pressure switch, valve timing control valve, actuator, ECM |
| P1023 | Valve timing control valve, bank 2 – circuit malfunction | Wiring, valve timing control valve, ECM |
| P1025 | Valve timing control valve, exhaust – circuit malfunction | Wiring, connections, valve timing control valve, ECM |
| P1100 | Intake manifold air control actuator position sensor – circuit malfunction | Wiring, position sensor, actuator, ECM |
| P1101 | Traction control vacuum solenoid – circuit malfunction | Wiring, vacuum solenoid, ECM |
| P1102 | Traction control vent solenoid -circuit malfunction | Wiring, vent solenoid, ECM |
| P1103 | Turbocharger (TC) wastegate actuator- malfunction | Wiring, VAF sensor, ECM |
| P1104 | Turbocharger (TC) wastegate regulating valve – malfunction | Wiring, TC wastegate regulating valve, ECM |
| P1105 | Fuel pressure regulator control solenoid – malfunction | Wiring, pressure regulator control solenoid, ECM |
| P1115 | Engine coolant temperature (ECT) sensor/intake air temperature (IAT) sensor/outside air temperature sensor – signal variation | Wiring, ECT sensor, IAT sensor, outside air temperature sensor, ECM |
| P1231 | Automatic stability control – implausible signal | Wiring, automatic stability control system fault, ECM |
| P1232 | Throttle control fail safe mode – malfunction | Wiring, ECM |
| P1233 | Throttle position (TP) sensor A – malfunction | Wiring, throttle position sensor (TPS), intake
leak, ECM |
| P1234 | Throttle position (TP) sensor B – malfunction | Wiring, throttle position sensor (TPS), intake leak, ECM |
| P1235 | Mass air flow (MAF) sensor – malfunction | Wiring, mass air flow (MAF) sensor, ECM |
| P1236 | Accelerator pedal position (APP) sensor B – malfunction | Wiring, ECM |
| P1237 | Accelerator pedal position (APP) sensor – malfunction | Wiring, accelerator pedal position (APP)
sensor, ECM |
| P1238 | Mass air flow (MAF) sensor – malfunction | Wiring, mass air flow (MAF) sensor, ECM |
| P1239 | Crankshaft position (CKP) sensor – range/performance problem | Wiring, crankshaft position (CKP) sensor, ECM |
| P1240 | Ignition timing error | ECM |
| P1241 | Torque management system – range/performance problem | Wiring, throttle actuator control (TAC), intake leak, ECM |
| P1242 | Engine RPM input – range/performance problem | Wiring, ECM |
| P1243 | Engine control module (ECM) – processor fault | ECM |
| P1244 | Engine control module (ECM) – RAM error | ECM |
| P1245 | Engine control module (ECM) – RAM error | ECM |
| P1246 | Engine control module (ECM) – processor fault | ECM |
| P1300 | Ignition timing adjustment – circuit malfunction | Wiring short to ground, ECM |
| P1320 | Ignition timing – cold start emission control | Coolant thermostat, ECM |
| P1400 | Manifold absolute pressure (MAP) sensor- circuit malfunction | Wiring, MAP sensor, ECM |
| P1443 | Evaporative emission (EVAP) canister purge system – control valve 2 circuit malfunction | Wiring, EVAP solenoid 2, ECM |
| P1500 | Generator system – circuit malfunction | Wiring, generator system, ECM |
| P1506 | Idle air control (lAC) valve – RPM lower than expected | Wiring, intake system blocked, MAP sensor, lAC valve, fuel pressure, ECM |
| P1507 | Idle air control (lAC) valve – RPM higher than expected | Wiring, intake air leak, throttle valve sticking, MAP sensor, ECM |
| P1530 | A/C control module – circuit malfunction | Wiring, AIC control module |
| P1540 | Radiator sensor – signal malfunction | Wiring, radiator, ECM |
| P1541 | Radiator sensor – signal malfunction | Wiring, radiator, ECM |
| P1543 | Radiator outlet engine temperature (ECT) – low input | Wiring, engine coolant radiator, coolant thermostat, engine coolant pump, ECT sensor, ECM |
| P1544 | Radiator outlet engine temperature (ECT) – high input | Wiring, engine coolant radiator, coolant thermostat, engine coolant pump, ECT sensor, ECM |
| P1545 | Radiator outlet engine temperature (ECT) – signal variation | Wiring, engine coolant radiator, ECT sensor, ECM |
| P1546 | Radiator outlet engine temperature (ECT) – signal variation | Wiring, engine coolant radiator, ECT sensor, ECM |
| P1547 | Radiator outlet engine temperature (ECT) – signal variation | Wiring, engine coolant radiator, ECT sensor, ECM |
| P1564 | Cruise control master switch – malfunction | Wiring, cruise control master switch, ECM |
| P1571 | Cruise control brake pedal switch – malfunction | Wiring, cruise control brake pedal switch, ECM |
| P1574 | Engine control module (ECM) – malfunction | Trouble codes stored, ECM |
| P1580 | Radiator outlet engine temperature (ECT) – communication malfunction | Wiring, ECT sensor, ECM |
| P1593 | Cruise control system, multi-function input A – circuit stuck | Wiring, poor connection, multi-function switch, mechanical fault, ECM |
| P1600 | AT to ECM – signal failure | Wiring, TCM, ECM |
| P1601 | ECM to throttle control unit – communication malfunction | ECM |
| P1602 | ECM to system LSI – communication malfunction | ECM |
| P1603 3 | Engine control module (ECM) – battery supply voltage | Wiring, ECM |
| P1603 4 | Engine control module (ECM) – RAM link error | ECM |
| P1604 | Engine control module (ECM) – RAM
read/write error | ECM |
| P1607 | Engine control module (ECM) – shut down timer error | ECM |
| P1610 | Immobilizer control module – circuit malfunction | Wiring, immobilizer control module, ECM |
| P1676 | VIN not programmed or mismatch – ECM | ECM |
| P1696 | Engine control module (ECM) – EEPROM
error | ECM |
| P1697 | Engine control module (ECM) – EEPROM
error | ECM |
| P1715 | Automatic transmission speed sensors
A & 8 – malfunction | Wiring, TCM, ECM |
| P1720 | Vehicle speed sensor (VSS) – circuit malfunction | Wiring, VSS, ECM |
| P1750 | AT- torque converter/shift control and pressure control solenoid valves – malfunction | Wiring, torque converter/shift control and pressure control solenoid valves, TCM, ECM |
| P1751 | Automatic transmission – control relay malfunction | Wiring, control relay, TCM, ECM |
| P1791 | Engine coolant temperature to TCM – signal malfunction | Wiring, TCM, ECM |
| P1795 | Throttle position (TP) switch to TCM – signal malfunction | Wiring, TCM, ECM |
| U1073 | CAN data bus – bus off, malfunction detected | Wiring, ECM |
| U1102 | Antilock brake system (ABS)/traction control system (TCS), CAN data bus- time out | Wiring, ABS control module, ECM |
| U1108 | Instrumentation control module, CAN data bus – time out | Wiring, instrumentation control module, ECM |
| U1109 | Multifunction control module, CAN data bus – time out | Wiring, multifunction control module, ECM |
| U1110 | AIC, CAN data bus – time out | Wiring, A/C control module, ECM |
| U1117 | Immobilizer control module, CAN data bus – time out | Wiring, immobilizer control module, ECM |
