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Possible Causes

Possible Causes 
INTERMITTENT DTC
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO GROUND
(K904) O2 RETURN (DOWN) CIRCUIT SHORTED TO GROUND
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO THE (K904) O2 RETURN (DOWN) CIRCUIT
1/2 OXYGEN SENSOR
POWERTRAIN CONTROL MODULE (PCM)

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

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