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Home › Chrysler › 2017 › 200 LX, Eng CD ED8 › Repair and Diagnosis › Engine Performance › System › 2.4L - DTCS P1523 To P2311 › DTC Troubleshooting › P2271-O2 Sensor 1/2 Signal Biased Rich › Set Condition

Set Condition

The Powertrain Control Module (PCM) detects that the downstream O2 Sensor does not transition from rich to lean.