Engine-Codes.com
Engine-Codes – Audi – P0598 Audi

P0598 Audi Code - Thermostat Heater Control Circuit Low

Quick Answer

The P0598 Audi code indicates an issue with the thermostat heater control circuit being lower than the expected voltage range. Common causes include Faulty thermostat heater, Wiring or connection issues in the thermostat heater circuit, Blown fuse related to the thermostat heater. 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
P0598 Audi indicates Thermostat Heater Control Circuit Low.
Common causes
Common causes include Faulty thermostat heater, Wiring or connection issues in the thermostat heater circuit, Blown fuse related to the thermostat heater.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
💬 Need more help? Ask Auto Expert for instant answers — it's free!
AutoCodes App

Fix Your Car Smarter

Try the New AutoCodes App!

Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.

AutoCodes App on Google Play

Code P0598 Audi Description

The P0598 Audi code indicates an issue with the thermostat heater control circuit being lower than the expected voltage range. The thermostat heater is responsible for regulating the temperature of the engine coolant to ensure optimal engine performance. When the control circuit is reading low, it means that the heater is not receiving enough power to function properly, which can lead to issues with engine temperature regulation.

OBDII Code P0598 Audi - Thermostat Heater Control Circuit Low
P0598 Audi Code - Thermostat Heater Control Circuit Low

Common Causes of P0598 Audi

  1. Faulty thermostat heater.
  2. Wiring or connection issues in the thermostat heater circuit.
  3. Blown fuse related to the thermostat heater.
  4. ECM (Engine Control Module) malfunction.
  5. Thermostat heater control circuit shorted to ground.

Symptoms of P0598 Audi

  1. Check engine light is illuminated on the dashboard.
  2. Engine temperature fluctuates erratically.
  3. Poor fuel efficiency.
  4. Engine overheating or running too cold.
  5. Reduced heater performance inside the vehicle.

How to Fix P0598 Audi

  1. Begin by diagnosing the root cause of the issue using a diagnostic scanner to pinpoint the exact problem within the thermostat heater control circuit.
  2. Inspect the wiring and connections related to the thermostat heater for any signs of damage or corrosion. Repair or replace as needed.
  3. Check and replace any blown fuses that may be affecting the thermostat heater's function.
  4. Test the thermostat heater itself to ensure it is functioning correctly. Replace if necessary.
  5. Clear the diagnostic trouble codes from the vehicle's ECM and test drive the vehicle to confirm that the issue has been resolved.

Cost to Fix P0598 Audi

The typical repair costs for resolving a P0598 Audi code can range from $150 to $500, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that the diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to consult with a professional mechanic to get an accurate estimate based on your specific circumstances.

What does this mean?

Tech Notes for P0598 Audi

If there are no coolant system leaks, replace the thermostat to fix the problem.

When is the Code Detected?

The P0598 is triggered when there is an open or short thermostat heather control circuit.

Need more information about the P0598 Audi code?

Need more information on how to fix the P0598 Audi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0598 Audi code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0598 Audi Code

1. What are common symptoms of OBDII code P0598 in an Audi related to the thermostat heater control circuit?

The common symptoms include engine overheating, temperature gauge fluctuations, poor fuel efficiency, and the Check Engine light illuminating.

2. What are the possible causes of OBDII code P0598 in an Audi?

The code P0598 in an Audi is typically caused by a faulty thermostat, damaged wiring or connectors in the heater circuit, a malfunctioning coolant temperature sensor, or a defective thermostat heater control module.

3. How can I diagnose the issue related to OBDII code P0598 in my Audi?

Diagnosing the problem involves checking the thermostat operation, inspecting the wiring and connectors for any damage, testing the coolant temperature sensor, and using a diagnostic scanner to retrieve freeze frame data and monitor live data related to the thermostat heater control circuit.

4. Can I continue driving my Audi with OBDII code P0598?

It is not recommended to drive your Audi with the code P0598 as it can lead to engine overheating and potential damage. It is best to address the issue promptly to prevent further problems.

5. What are some repair tips for fixing OBDII code P0598 in an Audi?

Repair tips include replacing the thermostat if it is faulty, repairing or replacing damaged wiring and connectors, testing and replacing the coolant temperature sensor if needed, and checking the thermostat heater control module for proper functioning.

6. How much does it cost to repair OBDII code P0598 in an Audi?

The cost of repairing OBDII code P0598 in an Audi can vary depending on the specific cause of the issue, parts needed for replacement, labor costs, and the repair shop's rates. It is advisable to get a diagnostic and repair quote from a qualified mechanic.

7. Can I reset the OBDII code P0598 in my Audi without fixing the underlying issue?

Resetting the code without fixing the underlying problem will only temporarily turn off the Check Engine light. The code is likely to reappear once the issue persists, and it is essential to address the root cause of the problem for a permanent solution.

8. Is OBDII code P0598 a common issue in Audi vehicles?

OBDII code P0598 related to the thermostat heater control circuit is a relatively common issue in Audi vehicles, especially in models equipped with electronic thermostat control systems.

9. Can a DIY enthusiast fix OBDII code P0598 in an Audi?

While some repairs related to OBDII code P0598 can be done by DIY enthusiasts, diagnosing and fixing electrical issues in the thermostat heater control circuit may require specialized tools and knowledge. It is recommended to consult a professional mechanic for accurate diagnosis and repair.

10. How long does it take to repair OBDII code P0598 in an Audi?

The repair time for OBDII code P0598 in an Audi can vary depending on the specific cause of the issue, the availability of parts, and the expertise of the mechanic. In general, the repair may take a few hours to half a day, but it is best to consult with a mechanic for a more accurate estimate.

Discuss the causes and fixes for P0598 Audi OBDII Code

Submit a New Comment

Code P0598 Audi comments

No comments found for this page.