AutoCodes – Audi – P0597 Audi

P0597 Audi 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 Audi 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.

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Code Popularity 17,752

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 27, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0597 Audi 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 Audi - Thermostat Heater Control Circuit Open - AutoCodes.com — P0597 Audi Code - Thermostat Heater Control Circuit Open

What does this mean?

What are the Possible Causes of the DTC P0597 Audi?

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 Audi?

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.

What does this mean?

Code Tech Notes

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

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0597 Audi 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.

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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 Audi Code

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

- Common symptoms include issues with engine temperature regulation, overheating, and potential illumination of the check engine light.

2. What are the possible causes of the P0597 code in an Audi?

- The code P0597 in an Audi is typically caused by a malfunction in the thermostat heater control circuit, which could be due to a faulty thermostat, damaged wiring, or a failed heater control valve.

3. How serious is the OBDII code P0597 in an Audi?

- While the code itself may not cause immediate harm to the vehicle, it can lead to engine overheating and potential damage if not addressed promptly.

4. Can I continue driving my Audi with the P0597 code present?

- It is not recommended to drive your Audi with the P0597 code present, as it can lead to engine overheating and other issues. It is best to have the problem diagnosed and repaired as soon as possible.

5. How can I diagnose the P0597 code in my Audi?

- Diagnosing the P0597 code involves using an OBDII scanner to read the code, checking the thermostat and related components for any visible damage, and testing the circuit for continuity.

6. What are some repair tips for fixing the P0597 code in an Audi?

- Repair tips include inspecting and replacing the thermostat, checking and repairing any damaged wiring, and testing the heater control valve for proper operation.

7. Can I reset the P0597 code in my Audi by disconnecting the battery?

- Disconnecting the battery may temporarily clear the code, but it is not a recommended method for fixing the underlying issue. It is best to diagnose and repair the problem to prevent it from recurring.

8. Is it possible to prevent the P0597 code from appearing in my Audi?

- Regular maintenance, including checking and replacing the thermostat as recommended by the manufacturer, can help prevent issues that may trigger the P0597 code.

9. How much does it typically cost to repair the P0597 code in an Audi?

- The cost of repairing the P0597 code in an Audi can vary depending on the extent of the issue and the labor rates in your area. It is advisable to get a diagnostic and repair quote from a trusted mechanic.

10. Can a DIY enthusiast fix the P0597 code in an Audi?

- While some DIY enthusiasts may have the skills to address the P0597 code, it is recommended to have the issue diagnosed and repaired by a professional mechanic to ensure proper resolution and prevent further damage.