P0598 on Chevrolet: How to Diagnose & Fix
Thermostat Heater Control Circuit Low
1 Chevrolet model · 1 documented issue · $150-$1,800 repair
P0598 on Chevrolet by model: symptoms, diagnosis and fix
Camaro owners report persistent overheating issues, particularly at idle, caused by cooling fan failures, faulty fan relays, clogged radiators, failing water pumps, and thermostat problems. Temperatures reaching 240-250°F have been reported.
Common Symptoms
- Temperature gauge reading above normal (240-250°F)
- Overheating primarily at idle or low speeds
- Coolant loss without visible external leaks
- Cooling fans not engaging
- Steam or coolant smell from engine bay
How to Fix
Radiator flush or replacement for clogged radiators. Cooling fan motor or relay replacement. Thermostat replacement. Water pump replacement. Coolant system pressure test to find leaks.
Sources for this issue (1)
P0598 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0598 mean on a Chevrolet?
P0598 stands for "Thermostat Heater Control Circuit Low." This code applies to engines with an electronically controlled (heated) thermostat and means the Powertrain Control Module detected an abnormally low voltage in the thermostat heater control circuit. The heater element lets the computer fine-tune coolant temperature for efficiency and emissions by opening the thermostat sooner under certain conditions. P0598 sets when the control or feedback circuit reads lower than expected (often a short to ground or loss of supply). It is found mainly on certain European makes (BMW, Mercedes, VW/Audi, etc.) and usually has little effect on driving. On Chevrolet it is documented across 1 model: Camaro.
What are the most common causes of P0598?
The most common causes of P0598 are: Faulty electronically controlled (map-controlled) thermostat, Short to ground in the heater control wiring, Corroded or loose thermostat connector, Open or damaged wiring in the control circuit, Low coolant level overheating the thermostat heater, Blown fuse or poor power supply to the circuit, Faulty PCM control driver. The specific cause varies by vehicle.
How much does it cost to fix P0598 on a Chevrolet?
Published repair estimates on Chevrolet range from $150 to $1,800 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
Looking for P0598 on a different make?
View P0598 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.