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Home >> Chrysler >> 2007 >> 300 Base >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P0125 To P0175 >> P0139-O2 Sensor 1/2 Slow Response >> Possible Causes

Possible Causes

Possible Causes 
INTERMITTENT DTC
EXHAUST LEAK
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K904) O2 RETURN (DOWN) CIRCUIT SHORTED TO VOLTAGE
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO GROUND
(K904) O2 RETURN (DOWN) CIRCUIT SHORTED TO GROUND
(K141) O2 1/2 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(K904) O2 RETURN (DOWN) CIRCUIT OPEN OR HIGH RESISTANCE
1/2 OXYGEN SENSOR

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

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