Home >> Chrysler >> 2005 >> PT Cruiser Base, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Powertrain Diagnostic Procedures - DRIVEABILITY - 1.6L Gas >> DRIVEABILITY - 1.6L Gas - Diagnostic Tests >> P0030-1/1 O2 Sensor Heater Circuit Open; P0036-1/1 O2 Sensor Heater Circuit Open >> Possible Causes