Trouble Code Charts
TROUBLE CODE IDENTIFICATION
| Code |
System Affected |
Probable Cause |
| 12 |
System Normal |
System Normal |
| 13 |
O2 Sensor |
Sensor or Circuit, ECM |
| 14 |
Coolant Temp. Sensor |
Sensor or Circuit, ECM |
| 15 |
Coolant Temp. Sensor |
Sensor or Circuit, ECM |
| 21 |
TPS Signal (High) |
TPS Adjustment, TPS, ECM |
| 22 |
TPS Signal (Low) |
TPS Adjustment, TPS, ECM |
| 24 |
Vehicle Speed Sensor |
Sensor or Ckt, ECM |
| 32 |
EGR System |
EGR Valve, Wiring Ckt, VSV |
| 33 |
MAP Sensor Signal (High) |
Sensor or Ckt, ECM |
| 34 |
MAP Sensor Signal (Low) |
Sensor or Ckt, ECM |
| 42 |
Elec. Spark Timing |
Wiring Ckt, Ign. Module, ECM |
| 43 |
Elec. Spark Control . |
Knock Sensor or Ckt, ESC Module or 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, Ign. Shielding, ECM |
| 51 |
PROM Error |
PROM or ECM |
| 52 |
Calpak Error |
Calpak or ECM |
| 54 |
Fuel Pump CKT (Low) |
Fuel Pump Relay, Wiring Ckt, Oil Pressure Switch, Backup Relay |
| 55 |
Faulty ECM |
ECM |