| 12 |
No RPM voltage to ECM. |
| 13 |
Oxygen sensor circuit. |
| 14 |
Shorted coolant temperature sensor circuit. |
| 15 |
Open coolant temperature sensor circuit. |
| 21 & 22 |
At same time, grounded WOT switch circuit. |
| 22 |
Short in adaptive vacuum or WOT circuit to ground. |
| 23 |
Open or grounded M/C solenoid circuit. |
| 44 |
Lean oxygen sensor indication. |
| 44 & 45 |
At same time, faulty oxygen sensor circuit. |
| 45 |
Rich oxygen sensor indication. |
| 51 |
Faulty PROM or improper PROM installation. |
| 52 & 53 |
Test bulb off - intermittent ECM problem, test bulb on - faulty ECM. |
| 54 |
Faulty M/C solenoid and/or ECM. |
| 55 |
Faulty oxygen sensor circuit or ECM. |