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Home › Dodge and Ram › 2024 › ProMaster 2500 Base › Repair and Diagnosis › Engine Performance › System › 3.6L - DTCS P0125 To P0140 › 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.