Trouble Code Identification
ECM TROUBLE CODE IDENTIFICATION
| Code | Circuit Affected |
|---|---|
| 12 | No Distributor Reference Signal to ECM |
| 13 | Open Oxygen Sensor Circuit |
| 14 | Coolant Sensor Circuit Shorted |
| 15 | Coolant Sensor Circuit Open |
| 21 | TPS Circuit Open or Misadjusted |
| 23 | M/C Solenoid Voltage Low to ECM |
| 34 | Diff. Press. (VAC) Sens. Signal Voltage Incorrect |
| 41 | No Distributor Reference Signal |
| 42 | EST or By-Pass Fault |
| 43 | ESC Voltage Low to ECM (4.3L Only) |
| 44 | Lean Exhaust Indication |
| 45 | Rich Exhaust Indication |
| 51 | PROM Problem |
| 54 | M/C Solenoid Voltage High to ECM |