P0598Medium urgency
Thermostat Heater Control Circuit Low
Engine · Cooling System
⚠️ Map-controlled thermostat function is impaired. Service within 1–2 weeks.
What this means
The electronically controlled thermostat heater circuit signal is reading low — typically from a short to ground.
Likely causes
- Short to ground in thermostat heater circuitMost common
- Failed thermostatMost common
Estimated repair cost
Electronic thermostat$80 – $300
Wiring repair$80 – $200
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Frequently asked questions about P0598
What does P0598 mean?
The electronically controlled thermostat heater circuit signal is reading low — typically from a short to ground.
Is P0598 serious?
Map-controlled thermostat function is impaired. Service within 1–2 weeks.
How much does it cost to fix P0598?
Repair costs for P0598 range from $80 – $300 depending on the root cause and your vehicle.
Can I drive with P0598?
You can drive short distances but should have it repaired within 1–2 weeks to prevent further damage.