ECM Trouble Code Identification
ECM TROUBLE CODE IDENTIFICATION
| Code | Circuit Affected | ||
|---|---|---|---|
| 12 | (1) No Reference Pulse | ||
| 13 | Oxygen sensor circuit | ||
| 14 | Shorted coolant sensor circuit | ||
| 15 | Open coolant sensor circuit | ||
| 21 | TPS signal voltage high | ||
| 23 | M/C solenoid circuit open or grounded | ||
| 34 | Vacuum sensor circuit | ||
| 41 | No distributor reference pulses | ||
| 42 | EST circuit | ||
| 44 | Lean oxygen sensor value | ||
| 45 | Rich oxygen sensor value | ||
| 51 | Faulty PROM, PROM installation or ECM | ||
| 54 | Shorted M/C solenoid or faulty ECM | ||
| 55 | Faulty ECM (4.1L only) | ||
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