AutoCodes – Volkswagen – P0597 Volkswagen

P0597 Volkswagen Code - Thermostat Heater Control Circuit Open

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
P0597 Volkswagen indicates Thermostat Heater Control Circuit Open.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 22,241
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 27, 2024
πŸ’¬ Need more help? Ask Coddy for instant answers β€” it's free!

Code P0597 Volkswagen Description

The Engine Control Module (ECM) controls the Pulse Width Modulated (PWM) thermostat. The engine coolant thermostat heater controls coolant flow and regulates the engine operating temperature. The ECM supplies 12 V to the thermostat. The ECM controls the engine coolant thermostat heater by grounding the control circuit with a solid state device called a driver. The driver is equipped with a feedback circuit that is pulled-up to a voltage. The ECM can determine if the control circuit is open, shorted to ground, or shorted to a voltage by monitoring the feedback voltage.
OBDII Code P0597 Volkswagen - Thermostat Heater Control Circuit Open - AutoCodes.com
P0597 Volkswagen Code - Thermostat Heater Control Circuit Open

What are the Possible Causes of the DTC P0597 Volkswagen?

  • Failed Engine Cooling Thermostat
  • Engine Cooling Thermostat harness is open or shorted
  • Engine Cooling Thermostat circuit poor electrical connection

How to Fix the DTC P0597 Volkswagen?

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 P0597 Volkswagen 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 P0597 Volkswagen code?

Need more information on how to fix the P0597 Volkswagen code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0597 Volkswagen 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 P0597 Volkswagen Code

1. What are the common symptoms of OBDII code P0597 in a Volkswagen related to the thermostat heater control circuit?

The common symptoms include engine overheating, a temperature gauge that does not reach normal operating levels, and a potential decrease in overall engine performance.

2. What are the possible causes of the OBDII code P0597 in a Volkswagen?

The code P0597 typically indicates an open circuit in the thermostat heater control system. Common causes include a faulty thermostat, damaged wiring or connectors, or a malfunctioning thermostat heater control module.

3. How can I diagnose the OBDII code P0597 in my Volkswagen related to the thermostat heater control circuit?

A thorough diagnostic process involves checking the thermostat, inspecting the wiring and connectors for any damage, and testing the thermostat heater control module for proper functionality using a multimeter.

4. Can I continue to drive my Volkswagen with the OBDII code P0597 present?

It is not recommended to drive your vehicle with the OBDII code P0597 present, as it can lead to engine overheating and potential damage. It is best to address the issue promptly to prevent further complications.

5. What are some repair tips for fixing the OBDII code P0597 in a Volkswagen?

Repair tips include replacing the faulty thermostat, repairing or replacing damaged wiring and connectors, and replacing the thermostat heater control module if necessary. It is essential to follow manufacturer guidelines and use quality replacement parts.

6. Is it possible to reset the OBDII code P0597 in a Volkswagen without addressing the underlying issue?

While clearing the error code may temporarily turn off the check engine light, the underlying issue causing the code will persist. It is crucial to diagnose and repair the problem to prevent further issues.

7. How much does it typically cost to repair the OBDII code P0597 in a Volkswagen?

The cost of repairing the OBDII code P0597 can vary depending on the specific issue and the labor rates in your area. It is recommended to obtain quotes from reputable mechanics or dealerships to determine the exact cost.

8. Can a DIY enthusiast tackle the repair of the OBDII code P0597 in a Volkswagen?

Depending on your skill level and experience with automotive repairs, some DIY enthusiasts may be able to address the OBDII code P0597. However, it is crucial to have the necessary tools, knowledge, and access to quality replacement parts.

9. How long does it take to repair the OBDII code P0597 in a Volkswagen?

The repair time for the OBDII code P0597 can vary based on the specific issue and the expertise of the individual performing the repair. In general, it may take a few hours to a full day to diagnose and address the problem effectively.

10. Will fixing the OBDII code P0597 improve the overall performance and fuel efficiency of my Volkswagen?

Yes, addressing the OBDII code P0597 and ensuring proper functioning of the thermostat heater control circuit can help improve engine performance and fuel efficiency by maintaining optimal operating temperatures.

Discuss the causes and fixes for P0597 Volkswagen OBDII Code

  • Hi, Where is the thermostat sensor situated on a 2005 golf 2.0 FSI?

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