Possible Causes
| Possible Causes |
|---|
| LOW FUEL PRESSURE OR VOLUME/RESTRICTED FUEL INJECTOR |
| ENGINE MECHANICAL - VACUUM LEAK |
| EXHAUST SYSTEM LEAK |
| LEAK IN THE PURGE FLOW SYSTEM |
| HIGH ETHANOL CONTENT (NON E85 VEHICLE) |
| FAULTY MAP SENSOR READING |
| O2 SENSOR WIRING ISSUE |
| O2 SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .