Thermostat: Testing and Inspection

THERMOSTAT

ON-BOARD DIAGNOSTICS


All gasoline powered models are equipped with On-Board Diagnostics for certain cooling system components. Refer to On-Board Diagnostics (OBD). If the powertrain control module (PCM) detects low engine coolant temperature, it will record a Diagnostic Trouble Code (DTC) in the PCM memory. Do not change a thermostat for lack of heat as indicated by the instrument panel gauge or by poor heater performance unless a DTC is present. On-Board Diagnostics (OBD)


The DTC can also be accessed through the DRB scan tool.