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Home >> Chrysler >> 2011 >> 300 C, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 198 (3.7L/4.7L/5.7L - DTCS P2173 To U1418 - NGC - 1500 & 2500) >> Diagnosis And Testing >> P2271-O2 Sensor 1/2 Signal Stuck Rich >> Possible Causes

Possible Causes

WARNING: This page is about a different car, the 2012 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Possible Causes 
OXYGEN SENSOR WIRING OR CONNECTORS
O2 SENSOR SIGNAL CIRCUIT
O2 SENSOR RETURN CIRCUIT
1/2 O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  .