Possible Causes
WARNING: This page is about a different car, the 2023 Jeep Grand Wagoneer L and 2023 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| LOW FUEL PRESSURE OR VOLUME/RESTRICTED FUEL INJECTOR |
| HIGH ETHANOL CONTENT (NON E85 VEHICLE) |
| ENGINE MECHANICAL - VACUUM LEAK |
| LEAK IN THE PURGE FLOW SYSTEM |
| EXHAUST SYSTEM LEAK |
| FAULTY MAF SENSOR READING |
| O2 SENSOR WIRING ISSUE |
| OXYGEN (O2) SENSOR |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .