| OBD-11 code | Fault location | Probable cause |
| PO, P2, UO | Refer to OBD-11 trouble code tables | – |
| P1026 | Variable valve lift oil control valve, RH bank – performance problem | Wiring, variable valve lift oil control valve, variable valve lift oil pressure switch, ECM |
| P1028 | Variable valve lift oil control valve, LH bank – performance problem | Wiring, variable valve lift oil control valve, variable valve lift oil pressure switch, ECM |
| P1086 | Intake manifold air control actuator position sensor, LH – voltage low | Wiring, intake manifold air control actuator position sensor, ECM |
| P1087 | Intake manifold air control actuator position sensor, LH – voltage high | Wiring, intake manifold air control actuator position sensor, ECM |
| P1088 | Intake manifold air control actuator position sensor, RH – voltage low | Wiring, intake manifold air control actuator position sensor, ECM |
| P1089 | Intake manifold air control actuator position sensor, RH – voltage high | Wiring, intake manifold air control actuator position sensor, ECM |
| P1090 | Intake manifold air control actuator, RH – stuck open | Wiring, intake manifold air control actuator position sensor, ECM |
| P1091 | Intake manifold air control actuator, RH – stuck closed | Wiring, intake manifold air control actuator position sensor, ECM |
| P1092 | Intake manifold air control actuator, LH – stuck open | Wiring, intake manifold air control actuator position sensor, ECM |
| P1093 | Intake manifold air control actuator, LH – stuck closed | Wiring, intake manifold air control actuator position sensor, ECM |
| P1094 | Intake manifold air control actuator, RH – open circuit | Wiring, intake manifold air control actuator position sensor, ECM |
| P1095 | Intake manifold air control actuator, RH – over currenUshort circuit | Wiring, intake manifold air control actuator position sensor, ECM |
| P1096 | Intake manifold air control actuator, LH – open circuit | Wiring, intake manifold air control actuator position sensor, ECM |
| P1097 | Intake manifold air control actuator, LH – over currenUshort circuit | Wiring, intake manifold air control actuator position sensor, ECM |
| P1100 | Starter signal – circuit malfunction | Starter motor circuit, NP/TR switch, CPP
switch, ECM |
| P1101 | Neutral position (NP) switch – MT – circuit malfunction | Wiring, NP switch, ECM |
| P1101 | Park/neutral position (PNP) switch- circuit malfunction | Wiring, PNP switch, ECM |
| P1102 | MAP/BARO sensor switching valve – circuit malfunction | Wiring, MAP/BARO sensor switching valve, ECM |
| P1103 | Engine torque control signal 1 – circuit malfunction | Wiring, ECM, TCM |
| P1104 | Traction control signal – circuit malfunction | Wiring, traction control module |
| P1106 | Engine torque control signal 2 – circuit malfunction | Wiring, ECM, TCM |
| P1107 | Secondary air injection (AIR) diagnosis solenoid – circuit malfunction | Wiring, AIR diagnosis solenoid, ECM |
| P1110 | Barometric pressure (BARO) sensor- voltage low | Wiring, BARO sensor, ECM |
| P1111 | Barometric pressure (BARO) sensor- voltage high | Wiring, BARO sensor, ECM |
| P1112 | Barometric pressure (BARO) sensor- range/
performance problem | Wiring, BARO sensor, ECM |
| P1115 | Engine torque control cut signal – voltage high | Wiring, ECM, TCM |
| P1116 | Engine torque control cut signal – voltage low | Wiring, ECM, TCM |
| P1120 | Starter signal – voltage high | Starter motor circuit, wiring short to positive, ECM |
| P1121 | Park/neutral position (PNP) switch/neutral position (NP) switch – voltage low | Wiring short to ground, selector cable, PNP
switch, ECM |
| P1122 | MAP/BARO sensor switching valve – voltage high | Wiring open/short to positive, MAP/BARO
sensor switching valve, ECM |
| P1124 | Traction control signal – voltage high | Wiring open/short to positive |
| P1130 | Heated oxygen sensor (H02S) 1 – open circuit | Wiring, H02S, ECM |
| P1131 | Heated oxygen sensor (H02S) 1 – short circuit | Wiring, H02S, ECM |
| P1132 | Heated oxygen sensor (H02S) 1 – voltage low | Wiring, H02S, ECM |
| P1133 | Heated oxygen sensor (H02S) 1 – voltage high | Wiring, H02S, ECM |
| P1134 | Engine control module (ECM) | ECM |
| P1137 | Heated oxygen sensor (H02S) 1 -range/
performance problem | Wiring, H02S, ECM |
| P1139 | Heated oxygen sensor (H02S) 1, heater control – range/performance problem | Wiring, H02S, ECM |
| P1140 | Heated oxygen sensor (H02S) 1, bank 2, heater – range/performance problem | Wiring, H02S, ECM |
| P1141 | Mass air flow (MAF) sensor- range/performance problem voltage high | MAF sensor |
| P1142 | Throttle position (TP) sensor – range/
performance problem voltage low | TP sensor |
| P1143 | Manifold absolute pressure (MAP) sensor/ barometric pressure (BARO) sensor – range/ performance problem voltage low | Hose leak/blockage, MAP/BARO sensor, MAP/ BARO sensor switching solenoid |
| P1144 | Manifold absolute pressure (MAP) sensor/ barometric pressure (BARO) sensor – range/ performance problem voltage high | MAP/BARO sensor |
| P1146 | Manifold absolute pressure (MAP) sensor – range/performance problem voltage high | Wiring, MAP sensor, TP sensor |
| P1150 | Heated oxygen sensor (H02S) 1, heater- voltage high | Wiring, H02S, ECM |
| P1151 | Heated oxygen sensor (H02S) 2 -voltage high | Wiring, H02S, ECM |
| P1152 | Heated oxygen sensor (H02S) 1, bank 1 -range/
performance problem voltage low | Wiring, H02S, ECM |
| P1153 | Heated oxygen sensor (H02S) 1, bank 1 -range/
performance problem voltage high | Wiring, H02S, ECM |
| P1154 | Heated oxygen sensor (H02S) 1, bank 2 -range/
performance problem voltage low | Wiring, H02S, ECM |
| P1155 | Heated oxygen sensor (H02S) 1, bank 2 – range/
performance problem voltage high | Wiring, H02S, ECM |
| P1160 | Throttle actuator control (TAC)- return spring failure | Wiring, TAC motor |
| P1207 | Injector air control solenoid – voltage low | Wiring, injector air control solenoid, ECM |
| P1208 | Injector air control solenoid – voltage high | Wiring, injector air control solenoid, ECM |
| P1208 | Knock sensor (KS)- voltage low | Wiring, KS, ECM |
| P1230 | Fuel pump (FP) control module- circuit malfunction | Wiring, FP control module, ECM |
| P1244 | Turbocharger (TC) wastegate regulating valve – voltage low | Wiring, TC wastegate regulating valve, ECM |
| P1245 | Turbocharger (TC) wastegate regulating valve- failsafe | Wiring, TC wastegate regulating valve, ECM |
| P1301 | Exhaust gas temperature sensor -misfire/fire due to increased temperature | Repair other DTC’s, replace pre-CAT |
| P1306 | Camshaft position (CMP) actuator, RH – open circuit | Wiring, CMP actuator |
| P1307 | Camshaft position (CMP) actuator, RH – short circuit | Wiring, CMP actuator |
| P1308 | Camshaft position (CMP) actuator, LH – open circuit | Wiring, CMP actuator |
| P1309 | Camshaft position (CMP) actuator, LH – short circuit | Wiring, CMP actuator |
| P1312 | Exhaust gas temperature sensor | Wiring, exhaust gas temperature sensor |
| P1325 | Knock sensor (KS) – voltage low | Wiring, KS, ECM |
| P1400 | Fuel tank pressure control solenoid -circuit malfunction voltage low | Wiring open/short to ground, fuel tank pressure control solenoid, ECM |
| P1401 | Fuel tank pressure control system – malfunction | EVAP system, fuel tank pressure sensor |
| P1402 | Fuel level sensor – circuit malfunction | Wiring, instrument cluster, fuel level sensor, ECM |
| P1420 | Fuel tank pressure control solenoid – circuit malfunction voltage high | Wiring open/short to positive, fuel tank pressure control solenoid, ECM |
| P1421 | Exhaust gas recirculation (EGR) system -voltage high | Wiring open/short to positive, EGR solenoid, ECM |
| P1422 | Evaporative emission (EVAP) canister purge valve – voltage high | Wiring open/short to positive, EVAP valve, ECM |
| P1423 | Evaporative emission (EVAP) canister purge system – vent control voltage high | Wiring open/short to positive, EVAP vent valve, ECM |
| P1440 | Fuel tank pressure control system – voltage low | Fuel tank pressure control solenoid, fuel filler cap, EVAP drain/vent valve, EVAP canister/ valve, fuel tank, hose/pipe leak |
| P1441 | Fuel tank pressure control system – voltage high | Fuel tank pressure control solenoid, fuel filler cap, EVAP drain/vent valve, EVAP valve, fuel tank, hose/pipe blockage |
| P1442 | Fuel level sensor – range/performance problem | Fuel level sensor |
| P1443 | Evaporative emission (EVAP) canister purge system – vent control malfunction | Hose blockage, EVAP drain valve |
| P1445 | Injector air control solenoid – circuit malfunction | Wiring, injector air control solenoid, ECM |
| P1446 | Evaporative emission (EVAP) atmospheric pressure solenoid – voltage low | Wiring, atmospheric pressure solenoid, ECM |
| P1447 | Evaporative emission (EVAP) atmospheric pressure solenoid – voltage high | Wiring, atmospheric pressure solenoid, ECM |
| P1448 | Evaporative emission (EVAP) atmospheric pressure solenoid – range/performance problem | Wiring, atmospheric pressure solenoid, ECM |
| P1480 | Engine coolant blower motor relay 1 – voltage high | Wiring, blower motor relay, ECM |
| P1490 | Thermostat – malfunction | Thermostat, cooling system, engine coolant blower motor |
| P1491 | Positive crankcase ventilation – malfunction | Wiring, hose blocked/leaking |
| P1492 | Exhaust gas recirculation (EGR) solenoid valve – signal 1 – voltage low | Wiring, EGR solenoid valve |
| P1493 | Exhaust gas recirculation (EGR) solenoid valve- signal 1 – voltage high | Wiring, EGR solenoid valve, ECM |
| P1494 | Exhaust gas recirculation (EGR) solenoid valve – signal 2 – voltage low | Wiring, EGR solenoid valve |
| P1495 | Exhaust gas recirculation (EGR) solenoid valve – signal 2 – voltage high | Wiring, EGR solenoid valve, ECM |
| P1496 | Exhaust gas recirculation (EGR) solenoid valve – signal 3 – voltage low | Wiring, EGR solenoid valve |
| P1497 | Exhaust gas recirculation (EGR) solenoid valve – signal 3 – voltage high | Wiring, EGR solenoid valve, ECM |
| P1498 | Exhaust gas recirculation (EGR) solenoid valve – signal 4 – voltage low | Wiring, EGR solenoid valve |
| P1499 | Exhaust gas recirculation (EGR) solenoid valve – signal 4 – voltage high | Wiring, EGR solenoid valve, ECM |
| P1500 | Engine coolant blower motor relay 1 – circuit malfunction | Wiring, blower motor relay, ECM |
| P1502 | Engine coolant blower motor – malfunction | Cooling system, radiator ventilation obstructed |
| P1505 | Idle air (lAC) control valve – voltage high | Wiring, lAC valve, ECM |
| P1507 | Idle air (lAC) control system – malfunction | Intake system, lAC valve |
| P1510 | Idle air (lAC) control valve, circuit 1 – voltage low | Wiring, lAC valve, ECM |
| P1511 | Idle air (lAC) control valve, circuit 1 -voltage high | Wiring, lAC valve, ECM |
| P1512 | Idle air (lAC) control valve, circuit 2 – voltage low | Wiring, lAC valve, ECM |
| P1513 | Idle air (lAC) control valve, circuit 2 -voltage high | Wiring, lAC valve, ECM |
| P1514 | Idle air (lAC) control valve, circuit 3 -voltage low | Wiring, lAC valve, ECM |
| P1515 | Idle air (lAC) control valve, circuit 3 – voltage high | Wiring, lAC valve, ECM |
| P1516 | Idle air (lAC) control valve, circuit 4 -voltage low | Wiring, lAC valve, ECM |
| P1517 | Idle air (lAC) control valve, circuit 4 -voltage high | Wiring, lAC valve, ECM |
| P1518 | Starter motor switch – circuit malfunction | Wiring |
| P1520 | Engine coolant blower motor relay 1 – voltage high | Wiring open/short to positive, blower motor relay, ECM |
| P1521 | Stop lamp switch – voltage high | Wiring, stop lamp switch |
| P1540 | Vehicle speed sensor (VSS)- malfunction 2 | Wiring, instrument cluster, VSS, ECM |
| P1544 | Exhaust gas temperature sensor – increased temperature detected | Repair other DTC’s, exhaust system, replace pre-CAT |
| P1560 | Engine control module (ECM) – battery voltage supply | Wiring, fuse, ECM |
| P1570 | Immobilizer read coil | Wiring, immobilizer read coil, immobilizer control module |
| P1571 | Engine control module (ECM)- incorrect immobilizer code | Immobilizer code not programmed |
| P1572 | Immobilizer control module/ECM – circuit malfunction | Wiring, immobilizer control module, ECM |
| P1574 | Immobilizer control module- communication error | Wiring, key not programmed, immobilizer control module |
| P1576 | Engine control module (ECM) – EEPROM error | ECM |
| P1577 | Immobilizer control module – EEPROM error | Immobilizer control module |
| P1578 | Body control module (SCM) to instrument cluster communication – malfunction | Wiring, instrument cluster |
| P1590 | Park neutral position (PNP) switch – voltage high | Wiring, PNP switch, ECM |
| P1591 | Park neutral position (PNP) switch – voltage low | Wiring, PNP switch, ECM |
| P1592 | Park neutral position (PNP) switch – circuit malfunction | Wiring, PNP switch, ECM |
| P1594 | Transmission control module (TCM) – communication circuit malfunction | Wiring, TCM, ECM |
| P1595 | Transmission control module (TCM)- communication circuit voltage low | Wiring, TCM, ECM |
| P1596 | Transmission control module (TCM)- communication circuit voltage high | Wiring, TCM, ECM |
| P1698 | Engine torque control cut signal – voltage low | Wiring, ECM, TCM |
| P1699 | Engine torque control cut signal – voltage high | Wiring, ECM, TCM |
| P1700 | AT- throttle position (TP) sensor- circuit malfunction | Wiring, TP sensor |
| P1701 | Cruise control set signal -AT- circuit malfunction | Wiring, cruise control switch, TCM |
| P1702 | AT diagnosis signal- voltage low | Wiring short circuit, TCM |
| P1703 | Shift solenoid (SS) low clutch timing – circuit malfunction | Wiring, shift solenoid, TCM |
| P1704 | Shift solenoid (SS) 2-4 brake timing – circuit malfunction | Wiring, shift solenoid, TCM |
| P1705 | Shift solenoid (SS) 2-4 brake pressure control – circuit malfunction | Wiring, shift solenoid, TCM |
| P1711 | Engine torque control signal 1 – circuit malfunction | Wiring, ECM, TCM |
| P1712 | Engine torque control signal 2 – circuit malfunction | Wiring, ECM, TCM |
| P1722 | AT diagnosis signal -voltage high | Wiring short to positive, TCM, ECM |
| P1742 | Automatic transmission diagnosis signal – circuit malfunction | Wiring, TCM |
