TROUBLE CODE IDENTIFICATION
| Code | System Affected | Probable Cause |
|---|---|---|
| 12 | System Normal | System Normal |
| 13 | O2 Sensor Circuit | Sensor/Circuit, ECM |
| 14 | Coolant Temp. Sensor (Shorted) | Temp. Sensor/Ckt., ECM |
| 15 | Coolant Temp. Sensor (Open) | Temp. Sensor/Circuit, ECM |
| 21 | Throttle Valve Switch (Idle & Full Throttle) | Switch/Circuit, ECM |
| 22 | Starter Signal | Circuit, ECM |
| 23 | Power Transistor (Shorted) | Transistor/Circuit, ECM |
| 25 | Press. Regulator VSV | VSV/Circuit, ECM |
| 26 | Canister Purge VSV | VSV/Circuit, ECM |
| 27 | Canister Purge VSV | VSV/Circuit, ECM |
| 32 | EGR System | EGR Valve, Backpressure Transducer, Vacuum Switching Valve |
| 33 | Fuel Injector Circuit (Open or Grounded) | Wiring, Dropping Resistor, ECM |
| 34 | EGR Temp. Sensor | Sensor/Circuit, ECM |
| 35 | Power Transistor (Open) | Transistor/Circuit, ECM |
| 41 | Crank Angle Sensor | Sensor/Circuit, ECM |
| 43 | Throttle Valve Switch (Idle Position) | Switch/Circuit, ECM |
| 44 | O2 Sensor (Lean/Rich) | Injectors, Fuel Press., Airflow Sensor, O2 Sensor Circuit, Cool. Temp. Sensor, ECM |
| 45 | O2 Sensor (Lean/Rich) | Injectors, Fuel Press., Airflow Sensor, O2 Sensor Circuit, Cool. Temp. Sensor, ECM |
| 51 | Faulty ECM ROM | Defective ECM |
| 52 | Faulty ECM RAM | Defective ECM |
| 53 | Press. Regulator VSV | VSV/Circuit, ECM |
| 54 | Power Transistor (Grounded) | Transistor/Circuit, ECM |
| 61 | Airflow Sensor | Sensor/Circuit, ECM |
| 62 | Airflow Sensor | Sensor/Circuit, ECM |
| 63 | Vehicle Speed Sensor | Sensor/Circuit, ECM |
| 64 | Fuel Injector Circuit (ECM Transistor) | Wiring Harness, ECM |
| 65 | Throttle Valve Switch (Full Throttle) | Switch/Circuit, ECM |
TROUBLE CODE IDENTIFICATION