Possible Causes
WARNING: This page is about a different car, the 2009 Jeep Patriot and 2009 Jeep Compass. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| EXHAUST SYSTEM LEAK |
| ENGINE MECHANICAL CONDITION |
| AGING OR CONTAMINATED O2 SENSOR |
| O2 SENSOR WIRING AND CONNECTORS |
| CATALYTIC CONVERTER |
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure .