Possible Causes
| Possible Causes |
|---|
| FUEL SYSTEM ISSUE CAUSING LOW FUEL PRESSURE OR VOLUME |
| O2 SENSOR WIRING ISSUE |
| O2 SENSOR HEATER ISSUE |
| O2 SENSOR |
| MAP SENSOR |
| EXHAUST SYSTEM LEAK |
| LEAK IN THE PURGE FLOW SYSTEM |
| EGR VALVE INTERNAL LEAK |
| ENGINE MECHANICAL - VACUUM LEAK |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .