Possible Causes
| Possible Causes |
|---|
| RESTRICTED FUEL SUPPLY LINE |
| FUEL PUMP INLET STRAINER PLUGGED |
| FUEL PUMP MODULE |
| O2 SENSOR HEATER OPERATION |
| O2 SIGNAL CIRCUIT |
| O2 RETURN CIRCUIT |
| O2 SENSOR |
| ECT SENSOR OPERATION |
| ENGINE MECHANICAL PROBLEM |
| FUEL FILTER/PRESSURE REGULATOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .