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Home >> Jeep >> 2009 >> Commander Overland, 4WD >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTCS P000B To P0123 - NGC >> P0058-O2 Sensor 2/2 Heater Circuit High >> Possible Causes

Possible Causes

Possible Causes 
(K399) O2 2/2 HEATER CONTROL CIRCUIT OPEN
(Z42) O2 2/2 HEATER GROUND CIRCUIT OPEN
(K399) O2 2/2 HEATER CONTROL CIRCUIT SHORTED TO VOLTAGE
2/2 O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. See  DTC-Based Diagnostics/MODULE, Powertrain Control (PCM) - Standard Procedure  . 

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