Ford P0597 OBD-II Trouble Code Definition: P0597 Thermostat Heater Control Circuit Open P0597 Ford OBD-II Trouble CodeDescription: OBD Trouble Code P0597 Thermostat Heater Control Circuit/Open What does the code mean? OBD-ii Code P0597 definition: Causes Causes of the OBD-II code P0597 – Open or short thermostat heather control circuit – Poor thermostat heather control circuit connection […]