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Home >> Jeep >> 2021 >> Compass Altitude, 4WD >> Repair and Diagnosis >> Engine Performance >> System >> 2.4L - DTCS P1E08 To P2AF5 >> Diagnosis And Testing >> P2271-O2 Sensor 1/2 Signal Biased Rich >> Possible Causes
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Possible Causes

Possible Causes
EXHAUST LEAK
FUEL SYSTEM RELATED ISSUES
O2 SENSOR 1/2
POWERTRAIN CONTROL MODULE (PCM)

Always perform the PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  . 

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