| Scan code | Fault location | Probable cause |
| PO, P2,UO | Refer to OBO-II trouble code tables | – |
| P1011 0 | Intake camshaft position (CMP) actuator, bank 1 -incorrect park position | Engine oil level/pressure, mechanical fault |
| P1012 0 | Exhaust camshaft position (CMP) actuator, bank 1 -incorrect park position | Engine oil level/pressure, mechanical fault |
| P1013 0 | Intake camshaft position (CMP) actuator, bank 2-incorrect park position | Engine oil level/pressure, mechanical fault |
| P1014 0 | Exhaust camshaft position (CMP) actuator, bank 2 -incorrect park position | Engine oil level/pressure, mechanical fault |
| P1101 | Intake air flow -incorrect | Wiring, mechanical fault, engine coolant temperature (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, SC boost pressure sensor |
| 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) 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 open circuit/short circuit to ground Ishortcircuit to positive, throttle control unit, ECM |
| P1125 | Accelerator pedal position (APP) sensor 1/2signal malfunction | Wiring, APP sensor, ECM |
| P1126 | Engine coolant temperature (ECT) sensormalfunction | Wiring, coolant thermostat, cooling system, ECT sensor, ECM |
| P1128 | Manifold absolute pressure (MAP) sensor signallow | Wiring, MAP sensor, ECM |
| P1129 | Manifold absolute pressure (MAP) sensor signal high | Wiring, MAP sensor, ECM |
| P1133 | Heated oxygen sensor (H02S) 1, bank 1insufficient switching | Wiring, oxygen sensor heater, exhaust system leaking, H02S |
| P1134 | Heated oxygen sensor (H02S) 1, bank 1, slowresponse | 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 |
| P1171 | Fuel system -lean during acceleration | Fuel filter, fuel pump, H02S, injectors |
| P1174 | Heated oxygen sensor (H02S) 1. bank 1 mixture variation between cylinders | Intake/exhaust leak/blockage, mechanical fault,ignition control, H02S |
| P1175 | Heated oxygen sensor (H02S) 1. bank 2 mixture variation between cylinders | Intake/exhaust leak/blockage, mechanical fault,ignition control, H02S |
| P1182 | Supercharger (SC) boost pressure sensor malfunction | Wiring, intake/exhaust leak/blockage, SC boost pressure sensor, SC bypass valve, BARO sensor, IAT sensor, MAP sensor, MAF sensor, ECM |
| P1183 | Supercharger (SC) boost pressure sensorvoltage low | Wiring, SC boost pressure sensor, ECM |
| P1184 | Supercharger (SC) boost pressure sensor voltage high | Wiring, SC boost pressure sensor, ECM |
| P1220 | Throttle motor position sensor 2 -circuit malfunction | Wiring open circuit/short circuit to ground/short circuit to positive, throttle control unit, ECM |
| P1221 | Throttle motor position sensor 1/2 -signal variation | Wiring, throttle control unit, ECM |
| P1255 | Fuel pump control module -driver over-temperature | Fuel pump control module |
| P1271 | Accelerator pedal position (APP) sensor 1/2signal variation | APP sensor |
| P1275 | Accelerator pedal pOSition (APP) sensor 1 circuit malfunction | Wiring open circuit/short circuit to ground/short circuit to positive, APP sensor, ECM |
| P1280 | Accelerator pedal position (APP) sensor 2 circuit malfunction | Wiring open circuit/short circuit to ground/short circuit to positive, APP sensor, ECM |
| P1336 | Crankshaft position (CKP) sensor -variation not learned | Learning procedure not performed |
| P1351 | Ignition control module (ICM). control -cylinder 1& 4 | Wiring open circuit/short circuit to ground/short circuit to positive, ICM, ECM |
| P1352 | Ignition control module (ICM). control -cylinder 2& 3 | Wiring open circuit/short circuit to ground/short circuit to positive, ICM, ECM |
| P1380 | Antilock brake system (ABS)/traction control system (TCS). rough road signal to ECM -malfunction | ABSITCS trouble code(s) stored |
| P1381 | Antilock brake system (ABS)/traction control system (TCS). rough road signal to ECM -nocommunication | Wiring, poor connections, ABSITCS |
| 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 fully closing | Wiring, poor connections, EGR valve position sensor, EGR solenoid |
| P1441 | Evaporative emission (EVAP) system -leak detected | Hose connection(s), EVAP canister, EVAP canister purge valve |
| P1512 | Throttle control unit -signal variation | Wiring, throttle control unit, ECM |
| P1514 | Intake air flow -excessive flow | Throttle control unit, MAP sensor, IAT sensorsignal, ECM |
| P1515 | Throttle command/actual throttle position signal variation | Wiring, throttle valve sticking, throttle control unit,ECM |
| P1516 | Throttle command/actual throttle position signal variation | Wiring, throttle control unit |
| P1523 | Throttle control unit, closed throttle position performance | Throttle valve movement restricted, throttle control unit |
| P1551 | Throttle control unit, closed throttle position -performance | Throttle valve movement restricted, throttle control unit |
| P1571 | Traction control system (TCS), torque request circuit | Wiring open circuit/short circuit to ground/short circuit to positive, ABS control module trouble code(s) stored, ECM |
| P1574 | Cruise control brake pedal switch -voltage high | Wiring, cruise control brake pedal switch, BPP switch |
| P1599 | Engine stall or near stall detected | ECM trouble code(s) stored, mechanical fault,transmission mechanical fault |
| P1600 | Engine control module (ECM) -memory performance | ECM |
| P1621 | Engine control module (ECM) memory performance | ECM |
| P1624 | Customer snapshot function operated | ECM trouble codes stored |
| P1627 | Engine control module (ECM) -memoryperformance | ECM |
| P1629 | Immobilizer control module -fuel enable signal | Incorrect ignition key, wiring open circuit/short circuit to ground/short circuit to positive,immobilizer control module, ECM |
| P1630 | Engine control module (ECM) -immobilizer code learning mode | Immobilizer code not programmed |
| P1631 | Engine control module (ECM) -incorrect immobilizer code | Incorrect key, immobilizer code not programmed |
| P1632 | Engine control module (ECM) -fuel disable signal lost | Fuses, BCM, immobilizer code |
| P1633 | Engine control module (ECM),. ignition supply voltage | Fuse, wiring open circuit, ECM |
| P1635 | Sensor supply voltage, circuit malfunction | Wiring short circuit to ground/positive, ground wiring open circuit, TP sensor, AlC pressure sensor, APP sensor, fuel tank pressure sensor,ECM |
| P1639 | Sensor supply voltage, circuit malfunction | Wiring short circuit to ground/positive, ground wiring open circuit, TP sensor, APP sensor, MAP sensor, ECM |
| P1640 | Engine control module (ECM), quad driver/output driver -circuit malfunction | Wiring, ECM controlled components, ECM 0 |
| P1650 | Engine control module (ECM), quad driver/output driver -circuit malfunction | Wiring, ECM controlled components, ECM 0 |
| P1660 | Engine control module (ECM), quad driver/output driver -circuit malfunction | Wiring, ECM controlled components, ECM 0 |
| P1668 | Altemator ‘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 0 |
| P167A | Engine control module (ECM), heated oxygen sensor (H02S) driver -internal circuit malfunction | ECM |
| P167D | Engine control module (ECM), ignition coil driver circuit malfunction | ECM |
| P1680 H | Engine control module (ECM) | ECM |
| P1680 D | Accelerator pedal position (APP) sensor 2 circuit malfunction | Wiring open circuit/short circuit to ground/short circuit to positive, APP sensor, ECM |
| P1681 | Engine control module (ECM) | ECM |
| P1682 | Engine control module (ECM), ignition supply voltage | Fuse, wiring open circuit, ECM |
| P1683 | Engine control module (ECM) | ECM |
| P1700 | Transmission control module (TCM) -MIL request circuit malfunction | OBO II TCM trouble codes stored |
| P1810 | Transmission fluid pressure (TFP) switch -manual valve position | Fluid level low, wiring, selector lever linkage incorrectly adjusted, ECMITCM |
| P1811 | Shift time too long -adaptation limit reached | Fluid level low, transmission mechanical fault |
| P1816 | Transmission fluid pressure (TFP) switch -invalidgear selection . | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECMITCM |
| P1818 | Transmission fluid pressure (TFP) switch -invalidgear selection | Wiring, selector lever linkage incorrectly adjusted, TFP switch, ECMITCM |
| P1819 | Transmission range (TR) switch, signals ‘AIB/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 ‘B’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 ‘AIB/C &P’ incorrect signal | Wiring, TR switch |
| P1826 | Transmission range (TR) switch, signal ‘C’voltage high | Wiring, TR switch |
| P1887 | Torque converter clutch (TCC) solenoid release switch -circuit malfunction | Wiring open circuit, TCC solenoid release switch, ECMITCM |
| P1845 | Torque limit management | Other trouble codes stored, ECM |
| U2100 | CAN data bus -communication malfunction | Wiring, ECM, SCM, TCM, TCS |
| U2102 | CAN data bus more modules programmed than detected | Wiring, ECM, SCM, TCM, TCS |
| U2104 | CAN data bus -anyone control module not communicating | Wiring, ECM, SCM, TCM, TCS |
| U2106 | Engine control module (ECM), CAN data bus -lost communication with transmission control module (TCM) | Wiring, TCM, ECM |
| U2107 | Engine control module (ECM), CAN data bus lost communication with body control module (BCM) | Wiring, SCM, ECM |
| U2108 | Engine control module (ECM), CAN data bus lost communication with traction control system (TCS) | Wiring, TCS, ECM |
