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Home >> Jeep >> 2024 >> Grand Cherokee Summit >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 85 (2.0L - DTCS P2228 To P2402) >> DTC Troubleshooting >> P2271-O2 Sensor 1/2 Signal Biased Rich >> Possible Causes

Possible Causes

WARNING: This page is about a different variant/trim than selected.
Possible Causes
OXYGEN SENSOR WIRING OR CONNECTORS
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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