Possible Causes
WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| HIGH RESISTANCE IN THE O2 SENSOR 1/2 HEATER CONTROL CIRCUIT |
| HIGH RESISTANCE IN THE O2 SENSOR 1/2 GROUND CIRCUIT |
| OXYGEN (O2) SENSOR 1/2 |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .