P0599 Cadillac Code - Thermostat Heater Control Circuit High
Quick Answer
The P0599 diagnostic trouble code (DTC) for Cadillac vehicles refers to the thermostat heater control circuit being high. Common causes include Faulty thermostat heater, Wiring issues such as shorts or open circuits, Faulty Engine Control Module (ECM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0599 Cadillac indicates Thermostat Heater Control Circuit High.
- Common causes
- Common causes include Faulty thermostat heater, Wiring issues such as shorts or open circuits, Faulty Engine Control Module (ECM).
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0599 Cadillac Description
The P0599 diagnostic trouble code (DTC) for Cadillac vehicles refers to the thermostat heater control circuit being high. This code typically indicates an issue with the thermostat heater control circuit, which is responsible for regulating the temperature of the engine coolant. The thermostat heater control circuit is an essential component of the engine cooling system, ensuring that the engine operates within the optimal temperature range.
Common Causes of P0599 Cadillac
- Faulty thermostat heater
- Wiring issues such as shorts or open circuits
- Faulty Engine Control Module (ECM)
- Corrosion or damage to electrical connections
- Coolant leaks affecting the thermostat
Symptoms of P0599 Cadillac
- Engine overheating
- Poor fuel economy
- Rough idling or stalling
- Check Engine Light illuminated
- Inaccurate temperature gauge readings
How to Fix P0599 Cadillac
- Begin by diagnosing the root cause of the issue using a diagnostic scanner to confirm the P0599 code.
- Inspect the thermostat heater and wiring for any visible signs of damage or corrosion.
- Test the thermostat heater control circuit for proper voltage and resistance.
- Replace the thermostat heater if it is found to be faulty, and repair any damaged wiring or connections.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0599 Cadillac
The cost of repairing a P0599 code can vary depending on the underlying cause of the issue. In general, replacing a faulty thermostat heater or repairing wiring issues may cost between $150 to $400, including parts and labor. However, it's important to note that labor rates can vary significantly between different auto repair shops, so it's advisable to obtain multiple quotes for a more accurate estimate. Additionally, the cost may increase if other components need to be replaced or if further diagnostics are required.
Tech Notes for P0599 Cadillac
Need more information about the P0599 Cadillac code?
Need more information on how to fix the P0599 Cadillac code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0599 Cadillac code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0599 Cadillac Code
No Frequently Asked Questions about P0599 Cadillac Code found.
Discuss the causes and fixes for P0599 Cadillac OBDII Code
Code P0599 Cadillac comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.