| Scan code | Fault location | Probable cause |
| PO, P2, UO | Refer to OBO-II trouble code tables | – |
| P1105 | Manifold absolute pressure (MAP) sensor! barometric pressure (BARO) sensor | Wiring, MAP!BARO sensor switch solenoid, hose connection(s), MAP sensor! BARO sensor |
| P1148 | Fuel trim (FT) -malfunction | Wiring, H02S, fuel system, ECM |
| P1217 | Engine overheating | Wiring, ECT sensor, cooling system |
| P1320 | Ignition check signal missing | Wiring, ignition system, CMP sensor |
| P1336 | Crankshaft position (CKP) sensor | Wiring, flywheel, CKP sensor |
| P1400 | Exhaust gas recirculation (EGR) pressure sensor circuit malfunction, low input | Wiring, EGR pressure sensor, ECM |
| P1401 | Exhaust gas recirculation (EGR) temperature sensor | Wiring, EGR temperature sensor |
| P1402 | Exhaust gas recirculation (EGR) system -high flow rate | Wiring, EGR hose(s), EGR valve, ECM |
| P1440 | Evaporative emission (EVAP) system -small leak detected | Hose connection(s), fuel filler cap, EVAP canister, EVAP pressure sensor, MAP sensor/BARO sensor, fuel tank vent valve |
| P1444 | Evaporative emission (EVAP) system -low input | Wiring, EVAP pressure sensor, ECM |
| P1446 | Evaporative emission (EVAP) canister purge valve -remains closed | Wiring, EVAP pressure sensor, EVAP canister purge valve |
| P1447 | Evaporative emission (EVAP) system -malfunctionlleak detected | Wiring, EVAP canister purge valve, EVAP pressure sensor, EVAP canister, CTP switch, hoses blockedlleaking |
| P1448 | Evaporative emission (EVAP) canister purge valve -remains open | Wiring, EVAP pressure sensor, EVAP canister purge valve |
| P1490 | Evaporative emission (EVAP) canister purge valve bypass solenoid | Wiring, EVAP canister purge valve bypass solenoid |
| P1491 | Evaporative emission (EVAP) canister purge valve bypass solenoid -malfunction | Wiring, EVAP canister, vacuum hoses, EVAP pressure sensor, EVAP canister purge valve bypass solenoid |
| P1492 | Evaporative emission (EVAP) canister purge valve -circuit malfunction | Wiring, EVAP canister purge valve |
| P1493 | Evaporative emission (EVAP) canister purge valve -malfunction, stuck open | EVAP canister purge valve, vacuum hose(s), EVAP pressure sensor, EVAP canister vent valve |
| P1605 | Engine control module (ECM)/transmission control module (TCM) -communication error | Wiring, battery, TCM, ECM |
| P1701 | Fuel trim (FT) -malfunction | Intake leak, AIR system, fuel pressure/pump, injector(s), EGR system, H02S |
| P1705 | Throttle position (TP) switch/sensor | Wiring, TP switch, TCM, ECM |
| P1706 | Transmission range (TR) switch/park/neutral pOSition (PNP) switch -malfunction | Wiring, TR switch/PNP switch, TCM |
| P1760 | Overdrive clutch solenoid valve -circuit malfunction | Wiring, overdrive clutch solenoid valve |
| P1900 | Engine coolant blower motor -circuit malfunction | Wiring, engine coolant blower motor relay, engine coolant blower motor |