P0597
1 Answer
P0597 is a Thermostat Heater Control Circuit/Open. The electronically controlled thermostat consists of various temperature and load sensors, a computer program and the control housing with a built-in thermostat. It can be cased by several things. The main ones are a loose or corroded connector on the thermostat, a coolant, leak, the thermostat itself has failed, a short or open has occurred in the wiring harness between the computer and the thermostat, or the motronic computer has failed.
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