Possible Causes
| Possible Causes |
|---|
| O2 RETURN WIRING ISSUE |
| O2 SENSOR |
| MAP SENSOR |
| LEAKING EVAP PURGE SOLENOID |
| EXCESSIVE FUEL PRESSURE OR POOR FUEL QUALITY/CONTAMINATION |
| FUEL PUMP MODULE |
| FUEL INJECTOR LEAKING INTO ENGINE |
| ENGINE MECHANICAL |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .