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Home >> Dodge and Ram >> 2011 >> Durango R/T, RWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P000A To P0140 >> Diagnosis And Testing >> P0138-O2 Sensor 1/2 Circuit High >> Possible Causes

Possible Causes

Possible Causes 
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K904) O2 RETURN DOWNSTREAM CIRCUIT SHORTED TO VOLTAGE
(K141) O2 1/2 SENSOR SIGNAL CIRCUIT OPEN
(K904) O2 RETURN DOWNSTREAM CIRCUIT OPEN
1/2 O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)

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