P0599 Code - Thermostat Heater Control Circuit High
Quick Answer
The Engine Control Module (ECM) controls the Pulse Width Modulated (PWM) thermostat. Common causes include Failed Engine Cooling Thermostat, Engine Cooling Thermostat harness is open or shorted, Engine Cooling Thermostat circuit poor electrical connection. 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 indicates Thermostat Heater Control Circuit High.
- Common causes
- Common causes include Failed Engine Cooling Thermostat, Engine Cooling Thermostat harness is open or shorted, Engine Cooling Thermostat circuit poor electrical connection.
- 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.
Code P0599 Description
What are the Possible Causes of the DTC P0599?
- Failed Engine Cooling Thermostat
- Engine Cooling Thermostat harness is open or shorted
- Engine Cooling Thermostat circuit poor electrical connection
How to Fix the DTC P0599?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0599 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the P0599 code?
Need more information on how to fix the P0599 code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0599 code diagnosed by a professional: Find a repair shop in your area
Information for Specific Makes
- P0599 Audi — Thermostat Heater Control Circuit High
- P0599 BMW — Thermostat Heater Control Circuit High
- P0599 Buick — Thermostat Heater Control Circuit High
- P0599 Cadillac — Thermostat Heater Control Circuit High
- P0599 Chevrolet — Thermostat Heater Control Circuit High
- P0599 GMC — Thermostat Heater Control Circuit High
- P0599 Mercedes-Benz — Thermostat Heater Control Circuit High
- P0599 MINI — Thermostat Heater Control Circuit High
- P0599 Volkswagen — Thermostat Heater Control Circuit High
Frequently Asked Questions about P0599 Code
1. What are common symptoms of OBDII code P0599 (Thermostat Heater Control Circuit High)?
- Common symptoms include the engine overheating, the temperature gauge showing incorrect readings, and a possible decrease in fuel efficiency.
2. What can cause the OBDII code P0599 to trigger?
- The code P0599 is typically triggered by a malfunction in the thermostat heater control circuit, which may be caused by a faulty thermostat, damaged wiring, or a defective thermostat heater.
3. How serious is the OBDII code P0599 (Thermostat Heater Control Circuit High)?
- While the code itself may not cause immediate harm to the engine, it can lead to engine overheating if not addressed promptly, potentially causing more severe damage.
4. How can I diagnose the OBDII code P0599?
- Diagnosing the OBDII code P0599 involves using an OBDII scanner to read the code, checking the thermostat and its wiring for any visible damage, and testing the thermostat heater for proper functionality.
5. Is it safe to continue driving with the OBDII code P0599 present?
- It is not recommended to continue driving with the OBDII code P0599 present, as it can lead to engine overheating and potential damage if the thermostat heater control circuit issue is not resolved.
6. Can I repair the thermostat heater control circuit issue myself?
- Depending on your experience and knowledge, you may be able to repair the thermostat heater control circuit issue yourself by replacing the faulty thermostat, repairing damaged wiring, or fixing the thermostat heater.
7. How much does it typically cost to repair the OBDII code P0599?
- The cost of repairing the OBDII code P0599 can vary depending on the underlying cause of the issue, but it may range from around $100 to $300 for parts and labor.
8. Are there any preventive measures to avoid the OBDII code P0599 in the future?
- To prevent the OBDII code P0599 from occurring in the future, it is recommended to perform regular maintenance on the cooling system, including checking the thermostat and its components for any signs of wear or damage.
9. Will clearing the OBDII code P0599 make it go away permanently?
- Clearing the OBDII code P0599 without addressing the underlying issue will not make it go away permanently. The issue causing the code to trigger needs to be identified and repaired to prevent it from reoccurring.
10. Can the OBDII code P0599 affect my vehicle's performance?
- Yes, the OBDII code P0599 can affect your vehicle's performance by causing engine overheating, incorrect temperature readings, and reduced fuel efficiency if not resolved in a timely manner.
Discuss the causes and fixes for P0599 OBDII Code
-
can I order a thermostat heater sensor and replace it in my car? I just installed a new thermostat in my 2009 chev aveo but this code won't clear.
-
Yes, if you replaced the thermostat, then you should be able to replace the heater.
P0599 CHEVROLET - Thermostat Heater Control Circuit High
Read more: http://www.autocodes.com/p0...
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
