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Home >> Dodge and Ram >> 2012 >> Caliber SXT Plus, Automatic CVT Trans >> Repair and Diagnosis >> Engine Performance >> System >> 2.0L - DTCS P000A To P0302 >> Diagnosis And Testing >> P0135-O2 Sensor 1/1 Heater Performance >> Possible Causes

Possible Causes

POSSIBLE CAUSES 
(K99) O2 1/1 HEATER CONTROL CIRCUIT OPEN OR HIGH RESISTANCE
GROUND CIRCUIT OPEN OR HIGH RESISTANCE
OXYGEN SENSOR 1/1
POWERTRAIN CONTROL MODULE (PCM)

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

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