FixVault

Home › Jeep › 2025 › Grand Cherokee Summit › Repair and Diagnosis › Engine Performance › System › 3.6L - DTCS P2226 To P2504 › 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 a rich to lean condition within a specific time during a DFSO event.