Possible Causes
WARNING: This page is about a different car, the 2024 Jeep Grand Wagoneer L and 2024 Jeep Grand Wagoneer. However, it is still accessible from the selected car via links, so may be relevant.
| Possible Causes |
|---|
| LOOSE CONNECTIONS AT THE POWERTRAIN CONTROL MODULE OR DOWNSTREAM O2 SENSOR |
| ASD RELAY OUTPUT CIRCUIT OPEN/HIGH RESISTANCE |
| O2 SENSOR 2/2 HEATER CONTROL CIRCUIT OPEN/HIGH RESISTANCE |
| O2 SENSOR 2/2 |
| POWERTRAIN CONTROL MODULE (PCM) |
Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .