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Home >> Chrysler >> 2006 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 1.6L Engine - DTCS B2277 To P0131, Diagnostic Code Index, Pre-Diagnostic Troubleshooting Procedure & Intermittent Condition >> Diagnosis And Testing >> P0038-1/2 O2 Sensor Heater Circuit High >> Possible Causes

Possible Causes

Possible Causes 
(K299) O2 SENSOR HEATER CONTROL CIRCUIT SHORTED TO (K342) ASD RELAY OUTPUT CIRCUIT
O2 HEATER ELEMENT
(K299) O2 SENSOR HEATER CONTROL CIRCUIT SHORT TO VOLTAGE
PCM

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

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