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Home › Jeep › 2017 › Wrangler Rubicon, Automatic Trans › Repair and Diagnosis › Engine Performance › System › 3.6L - DTCS P2123 To U1418 › Diagnosis And Testing › 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.