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Home >> Chrysler >> 2006 >> 300 C, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - DTCS P0122 To P0175 >> Diagnosis And Testing >> P0139-O2 Sensor 1/2 Slow Response >> Possible Causes
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Possible Causes

Possible Causes 
EXHAUST LEAK
(K141) O2 1/2 SIGNAL CIRCUIT
(K904) O2 DOWNSTREAM RETURN CIRCUIT
O2 SENSOR

Always perform the  PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE  before proceeding. 

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