Thermostat Heater Control Circuit Open
Engine · Cooling System
The electronically controlled thermostat heater has an open circuit. Map-controlled thermostats use an internal heater to vary opening temperature based on engine load — an open heater circuit locks the thermostat at one temperature.
- Failed electronically controlled thermostatMost common
- Open heater circuit wiringCommon
- Blown thermostat heater fuseLess common
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Frequently asked questions about P0597
What does P0597 mean?
The electronically controlled thermostat heater has an open circuit. Map-controlled thermostats use an internal heater to vary opening temperature based on engine load — an open heater circuit locks the thermostat at one temperature.
Is P0597 serious?
Engine may run too cold or at a fixed temperature. Fuel economy suffers. Service within 1–2 weeks.
How much does it cost to fix P0597?
Repair costs for P0597 range from $80 – $300 depending on the root cause and your vehicle.
Can I drive with P0597?
You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.