FixVault

Home › Dodge and Ram › 2021 › ProMaster 2500 › Repair and Diagnosis › Engine Performance › System › 3.6L - DTCS P0139 To P0345 › 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 diagnostic will fail.