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Home >> Dodge and Ram >> 2008 >> Magnum Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTCS P0123 To P0175 >> P0139-O2 Sensor 1/2 Slow Response >> Possible Causes
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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

Perform *PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .