| Scan code | Fault location | Probable cause |
| PO, P2, UO | Refer to OBO-II trouble code tables | – |
| P1106 | Manifold absolute pressure (MAP) sensor, circuitintermittent, voltage high | Wiring open circuit/short circuit to positive |
| P1107 | Manifold absolute pressure (MAP) sensor, circuit intermittent, voltage low | Wiring short circuit to ground |
| P1111 | Intake air temperature (IAT) sensor, circuitintermittent, voltage high | Wiring open circuit, ground lead defective |
| P1112 | Intake air temperature (IAT) sensor, circuitintermittent, voltage low | Wiring short circuit to ground |
| P1114 | Engine coolant temperature (ECT) sensor, circuit malfunction, voltage low | Wiring short circuit to ground |
| P1115 | Engine coolant temperature (EeT) sensor, circuit malfunction, voltage high | Wiring open circuit, ground lead defective |
| P1121 | Throttle position (TP) sensor, circuit malfunction,voltage high | Wiring open circuit/short circuit to positive, TP sensor |
| P1122 | Throttle position (TP) sensor, circuit malfunction,voltage low | Wiring open circuit/short circuit to ground, TP sensor |
| P1133 | Oxygen sensor (02S)/heated oxygen sensor(H02S) 1, bank 1 -insufficient switching | Wiring, oxygen sensor heater, exhaust system leaking, 02S/H02S |
| P1134 | Oxygen sensor (02S)/heated oxygen sensor (H02S) 1, bank 1, slow response | Wiring, oxygen sensor heater, exhaust system leaking, 02S/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 |
| P1171 | Fuel system -lean during acceleration | Fuel filter, fuel pump, H02S, injectors |
| P1215 | Engine control module (ECM), ground detection -malfunction | Wiring, ECM |
| P1245 | Intake manifold air control solenoid -circuit malfunction | Wiring, intake manifold air control solenoid, ECM |
| P1271 | Accelerator pedal position (APP) sensor 1/2 signal variation | APP sensor |
| P1277 | Accelerator pedal position (APP) sensor 1 voltage low | Wiring, APP sensor |
| P1278 | Accelerator pedal position (APP) sensor 1 voltage high | Wiring, APP sensor |
| P1282 | Accelerator pedal position (APP) sensor 2 voltage low | Wiring, APP sensor |
| P1283 | Accelerator pedal position (APP) sensor 2 voltage high | Wiring, APP sensor |
| P1336 | Crankshaft position (CKP) sensor -variation not leamed | 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 groundl short circuit to positive, ICM, ECM |
| P1380 | Rough road signal error | ASS control module trouble code(s) stored |
| P1403 | Exhaust gas recirculation (EGR) solenoid -voltage low | Wiring short circuit to ground, EGR solenoid |
| P1404 | Exhaust gas recirculation (EGR) valve, stuck open | Wiring open circuit/short circuit to positive, EGR valve position sensor, EGR solenoid |
| P1405 | Exhaust gas recirculation (EGR) solenoid -voltage high | Wiring short circuit to positive, EGR solenoid |
| P1406 | Exhaust gas recirculation (EGR) valve position sensor circuit malfunction | Wiring, EGR valve position sensor, EGR valve |
| P1441 | Evaporative emission (EVAP) system -leak detected | Hose connection(s), EVAP canister, EVAP canister purge valve |
| P1508 | Idle air control (lAC) valve, rpm low | Wiring open circuit/short circuit to ground, intake system blocked, throttle valve, lAC valve, ECM |
| P1509 | Idle air control (lAC) valve, rpm high | Wiring open circuit/short circuit to ground, intake system blocked, throttle valve, lAC valve, ECM |
| P1510 | Throttle control unit -performance | Wiring, throttle motor, throttle spring, TP sensor |
| P1511 | Throttle control unit -back up performance | Wiring, throttle motor, throttle spring, TP sensor |
| P1516 | Throttle command/actual throttle position -signal variation | Wiring, throttle control unit |
| P1519 | Engine control module (ECM), throttle actuator control -output driver malfunction | Wiring, throttle control unit, ECM |
| P1523 | Throttle control unit, .closed throttle position -performance | Throttle valve movement restricted, throttle control unit |
| P1526 | Throttle control unit -replaced or flat battery | Initial learn procedure not carried out |
| P1530 | Throttle control system -malfunction | TP sensor, ECM |
| P1551 | Throttle control unit, closed throttle position performance | Throttle valve movement restricted, throttle control unit |
| P1555 | Electronic variable orifice -circuit malfunction | Wiring, electronic variable orifice, ECM |
| P1580 | Cruise control system, move circuit -voltage low | Wiring, poor connections |
| P1581 | Cruise control system, move circuit -voltage high | Wiring, poor connections |
| P1582 | Cruise control system, direction circuit -voltage low | Wiring, poor connections |
| P1583 | Cruise control system, direction circuit -voltage high | Wiring, poor connections |
| P1584 | Cruise control system, cancel circuit malfunction | Wiring, poor connections, master switch |
| P1599 | Engine stall or near stall detected | ECM trouble code(s) stored, mechanical fault, transmission mechanical fault |
| P1600 | Engine control module (ECM) -malfunction | ECM |
| P1601 | CAN data bus, engine control module (ECM)I antilock braking system (ABS)/traction control system (TCS)/instrumentation control moduleldiagnostic control module some communication lost | Wiring, poor connections, ECM, ABS/TCS,diagnostic control module, instrumentation control module |
| P16020 | CAN data bus, antilock braking system (ASS)I traction control system (TCS) to engine control module (ECM) -lost communication | Wiring, poor connections, ABS control module trouble code(s) stored |
| P1602 f) | Engine control module (ECM), knock sensor circuit malfunction | ECM |
| P1620 | Engine coolant ‘low’ waming lamp switch | Coolant level low, wiring, engine coolant ‘low’ warning lamp switch |
| P1621 | Engine control module (ECM) -memory performance | ECM |
| P1623 | Engine control module (ECM), transaxle temperature -malfunction | ECM |
| P1625 | Engine control module (ECM) -memory malfunction | ECM |
| P1627 | Engine control module (ECM) -malfunction | ECM |
| P1628 | Engine control module (ECM), engine coolanttemperature -malfunction | Engine control module (ECM) |
| P1630 | Engine control module (ECM) -immobilizer code learning mode | Immobilizer code not programmed |
| P1631 | Engine control module (ECM) -incorrectimmobilizer code | Incorrect key, immobilizer code not programmed |
| P1632 | Engine control module (ECM) -fuel disable signal lost | Fuses, BCM, immobilizer code |
| P1635 | Sensor supply voltage, circuit malfunction | Wiring short circuit to ground/positive, ground wiring open circuit, TP sensor, MAP sensor, EGR valve position sensor, ECM |
| P1637 | Alternator ‘L’ terminal, circuit malfunction | Wiring open circuit/short circuit to ground,alternator, battery temperature sensor, ECM |
| P1639 | Engine control module (ECM) -malfunction | ECM |
| P1640 | Engine control module (ECM), quad driverl output driver -circuit malfunction | Wiring, ECM controlled components, ECM D |
| P1641 | Engine control module (ECM), quad driverl output driver -circuit malfunction | Wiring, ECM controlled components, ECM D |
| P1650 | Engine control module (ECM), quad driverl output driver -circuit malfunction | Wiring, ECM controlled components, ECM D |
| P1651 | Engine control module (ECM), quad driverl output driver -circuit malfunction | Wiring, ECM controlled components, ECM D |
| P1660 | Transmission control module (TCM), ground detection -malfunction | Wiring, TCM |
| P1669 | Engine control module (ECM), programmed for ASS -incorrectly programmed or ASS signal not received | Without ABS reprogram ECM, with ABS check wiring |
| P1680 | Engine control module (ECM) -malfunction | Engine control module (ECM) |
| P1681 | Engine control module (ECM) -malfunction | Engine control module (ECM) |
| P1683 | Engine control module (ECM) -malfunction | Engine control module (ECM) |
| P1691 | Engine control module (ECM), coolanttemperature gauge output signal -circuit malfunction | Wiring, poor connections, ECM |
| P1693 | Engine control module (ECM), tachometer output signal -circuit malfunction | Wiring, poor connections, ECM |
| P1694 | Engine control module (ECM), speedometer output signal -circuit malfunction | Wiring, poor connections, ECM |
| P1695 | Remote central locking module, entry signalvoltage low | Wiring, poor connections, central locking module, ECM |
| P1696 | Remote central locking module, entry signal voltage low | Wiring, poor connections, central locking module, ECM |
| P1780 | Transmission control module (TCM), MIL ONrequest -transmission malfunction | Transmission trouble codes stored |
| P1810 | Transmission fluid pressure (TFP) switch manual valve position | Fluid level low, wiring open circuit/short circuit to ground, selector lever linkage incorrectly adjusted, ECM |
| P1811 | Shift time too long -adaptation limit reached | Fluid level low, transmission mechanical fault |
| P1845 | Engine control module (ECM), torque management -torque higher than expected | MAF sensor, ECT sensor, fuel injectors |
| P1860 | Torque converter clutch (TCC) solenoid -circuit malfunction | Wiring open circuit/short circuit to ground, TCC solenoid, ECM |
| P1887 | Torque converter clutch (TCC) release switchcircuit malfunction | Wiring open circuit, TCC solenoid release switch, ECM |
| U1000 | CAN data bus -communication malfunction | Wiring, SCM, ECM, instrumentation control module, SOM |
| U1016 | Engine control module (ECM), CAN data buscommunication malfunction | Wiring, ECM |
| U1064 | Body control module (BCM), CAN data buscommunication malfunction | Wiring, SCM |
| U1096 | Instrumentation control module, CAN data bus communication malfunction | Wiring, instrumentation control module |
| U1300 | CAN data bus -signal low | Wiring |
| U1301 | CAN data bus -signal high | Wiring |
| U2100 | CAN data bus -communication malfunction | Wiring |
| U2103 | CAN data bus :… not all programmed modules detected | Wiring, ECM, SCM, TCM |
| U2104 | CAN data bus -anyone control module notcommunicating | Wiring, ECM, SCM, TCM |
| U2105 | . Engine control module (ECM), CAN data bus lost communication with body control module (BCM)/transmission control module (TCM) | Wiring |
| U2106 | Transmission control module (TCM), CAN data bus -lost communication with body control module(BCM)/engine control module (ECM) | Wiring |
| U2107 | Body control module (BCM), CAN data bus lost communication with engine control module(ECM)/transmission control module (TCM) | Wiring |
