FixVault

Home › Jeep › 2025 › Grand Cherokee Summit › Repair and Diagnosis › Engine Performance › System › 3.6L - DTCS P0129 To P0141 › DTC Troubleshooting › P0139 O2 Sensor 1/2 Slow Response › Set Condition

Set Condition

If the PCM does not detect a rich to lean switch within a specific time during a Decel Fuel Shutoff Event, the monitor will fail.