October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.
ECM Trouble Code Id
ECM TROUBLE CODE IDENTIFICATION
| Trouble Code |
Circuit Malfunction |
| 12 |
No distributor reference pulse to ECM |
| 13 |
Oxygen sensor circuit |
| 14 |
Shorted coolant sensor circuit |
| 15 |
Open coolant sensor circuit |
| 21 |
Throttle position sensor circuit |
| 23 |
Open or grounded M/C solenoid circuit |
| 24 |
Vehicle speed sensor |
| 34 |
Vacuum sensor circuit |
| 41 |
No distributor reference pulses at specified engine vacuum |
| 42 |
EST or EST bypass circuit grounded or open |
| 44 |
Lean oxygen sensor value |
| 44 & 45 |
Faulty oxygen sensor circuit |
| 45 |
Rich oxygen sensor value |
| 51 |
Faulty PROM or improper PROM installation |
| 54 |
Shorted M/C or faulty ECM |
| 55 |
Grounded voltage reference, high voltage on oxygen sensor circuit or ECM |