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Home › Chrysler › 2018 › Pacifica Touring Plus, Gas › Repair and Diagnosis › Engine Performance › System › 3.6L - DTCS P1E28 To U0101 › DTC Troubleshooting › P2271-O2 Sensor 1/2 Signal Biased Rich › Set Condition

Set Condition

The PCM detects that the Downstream O2 Sensor does not transition from a rich to lean condition within a specific time during a DFSO event.