P0598: Thermostat Heater Control Circuit Low
12 vehicles · 6 makes · $60-$5,000 repair
P0598 is an OBD-II diagnostic trouble code meaning “Thermostat Heater Control Circuit Low.” The heated thermostat control circuit voltage is lower than expected. This code appears across 12 vehicle models from 6 manufacturers, with repair costs ranging from $60 to $5,000.
Common Causes
Typical Repair Cost
Based on 13 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
To diagnose P0598, you'll need an OBD-II scanner. Here are our recommendations at every price point.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple, affordable code reader that reads and clears check engine codes. Great for quick diagnostics on any OBD-II vehicle (1996+).
- Read & clear engine codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth OBD-II scanner with a free companion app. Provides enhanced diagnostics, smog readiness, and repair reports sourced from a database of verified fixes.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X OBD-II Scanner
by LAUNCH
A professional-grade handheld scanner that reads all four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level diagnostic tablet with bi-directional control, active tests, and full system coverage. Ideal for serious DIYers and small shops.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.
Vehicles Affected (12)
Thermostat Housing Coolant Leak / Cracking
Engine Overheating / Water Pump and Radiator Fan Failure
Thermostat Housing Coolant Leak
Engine Overheating / Cooling System Failures
FAQ
What does P0598 mean?
P0598 stands for "Thermostat Heater Control Circuit Low." The heated thermostat control circuit voltage is lower than expected.
What are the most common causes of P0598?
The most common causes of P0598 are: Failed heated thermostat, Short to ground in wiring, Corroded connector, Bad ground connection, Harness damage. The specific cause varies by vehicle.
How much does it cost to fix P0598?
Repair costs for P0598 range from $60 to $5,000, depending on the vehicle and root cause.
Which vehicles are affected by P0598?
Au7o has documented P0598 across 12 vehicle models from 6 manufacturers: Audi, BMW, Chevrolet, Dodge, Jeep, MINI.
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.