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Home >> Dodge and Ram >> 2012 >> Caliber SXT >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - DTCS P000A To P0302 >> Diagnosis And Testing >> P0037-O2 Sensor 1/2 Heater Circuit Low >> Possible Causes

Possible Causes

Possible Causes 
(K299) O2 1/2 HEATER CONTROL CIRCUIT SHORTED TO GROUND
(K299) O2 1/2 HEATER CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
(Z932) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
OXYGEN SENSOR 1/2
POWERTRAIN CONTROL MODULE (PCM)

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

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