Trouble Code Charts
TROUBLE CODE IDENTIFICATION
| Code |
System Affected |
Probable Cause |
| 12 |
System Normal |
System Normal |
| 13 |
O2 Sensor (Open) |
Sensor or Circuit, ECM |
| 14A |
Coolant Temp. Sensor |
Sensor or Circuit, ECM |
| 14B |
Coolant Temp. Sensor |
Sensor or Circuit, ECM |
| 21A |
TPS Signal (High) |
Sensor or Circuit, ECM |
| 21B |
TPS Signal (Low) |
Sensor or Circuit, ECM |
| 23A |
MAT Sensor |
Sensor or Circuit, ECM |
| 23B |
MAT Sensor |
Sensor or Circuit, ECM |
| 24 |
Vehicle Speed Sensor |
Sensor or Circuit, ECM |
| 33A |
MAP Sensor (High) |
Sensor or Circuit, ECM |
| 33B |
MAP Sensor (Low) |
Sensor or Circuit, ECM |
| 42 |
Elec. Spark Timing |
Circuit, Ign. Module, ECM |
| 44 |
O2 Sensor (Lean) |
Injectors, Fuel Press., EGR, Exhaust Leaks, O2 Sensor or Ckt, MAP Sensor, ECM |
| 45 |
O2 Sensor (Rich) |
Injectors, Fuel Press., EGR, O2 Sensor or Ckt, MAP Sensor, TPS, Canister Purge, Ignition Shielding, ECM |
| 51 |
ECM/PROM Failure |
ECM or PROM Failure |