P0597 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 Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0597 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
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
Code P0597 Description
What are the Possible Causes of the DTC P0597?
- 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?
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 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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Information for Specific Makes
- P0597 Audi — Thermostat Heater Control Circuit Open
- P0597 BMW — Thermostat Heater Control Circuit Open
- P0597 Buick — Thermostat Heater Control Circuit Open
- P0597 Cadillac — Thermostat Heater Control Circuit Open
- P0597 Chevrolet — Thermostat Heater Control Circuit Open
- P0597 Ford — Thermostat Heater Control Circuit Failure
- P0597 GMC — Thermostat Heater Control Circuit Open
- P0597 Mercedes-Benz — Thermostat Heater Control Circuit/Open
- P0597 MINI — Thermostat Heater Control Circuit Open
- P0597 Volkswagen — Thermostat Heater Control Circuit Open
Frequently Asked Questions about P0597 Code
1. What are the common symptoms of OBDII code P0597 (Thermostat Heater Control Circuit Open)?
The common symptoms of P0597 include the engine taking longer to reach operating temperature, poor fuel economy, and possibly an illuminated check engine light.
2. What can cause the OBDII code P0597 to be triggered?
The most common causes of P0597 are a faulty thermostat heater, damaged wiring in the thermostat heater circuit, or a faulty engine control module (ECM).
3. How can I diagnose the OBDII code P0597?
Diagnosing P0597 typically involves checking the thermostat heater circuit for continuity, inspecting the wiring for damage, and testing the thermostat heater resistance with a multimeter.
4. Can I continue to drive my vehicle with OBDII code P0597?
It is not recommended to drive your vehicle with code P0597 for an extended period as it can lead to issues such as poor engine performance and reduced fuel efficiency.
5. How can I repair OBDII code P0597?
Repairing P0597 often involves replacing the faulty thermostat, repairing damaged wiring, or replacing the engine control module if necessary.
6. Are there any DIY tips for fixing OBDII code P0597?
DIY enthusiasts can attempt to inspect the wiring for visible damage and check the thermostat heater resistance with a multimeter before seeking professional help.
7. Can a faulty thermostat cause code P0597 to appear?
Yes, a faulty thermostat heater is a common culprit behind OBDII code P0597 as it can lead to an open circuit in the thermostat heater control circuit.
8. How much does it typically cost to repair OBDII code P0597?
The cost of repairing P0597 can vary depending on the extent of the issue, but it generally ranges from $200 to $500 at a repair shop.
9. Will resetting the check engine light clear OBDII code P0597?
Resetting the check engine light may temporarily clear the code, but if the underlying issue causing P0597 is not fixed, the code is likely to reappear.
10. Is it necessary to visit a mechanic for OBDII code P0597, or can I fix it myself?
While some DIY enthusiasts may be able to diagnose and fix P0597 themselves, it is recommended to consult a qualified mechanic for a proper diagnosis and repair to ensure the issue is resolved correctly.
Discuss the causes and fixes for P0597 OBDII Code
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I have the sensor for my Chevy Sonic 2012 but where is it located? PLEASE help!
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What sensor? The coolant temperature sensor is on the back of the engine. You should change the engine coolant thermostat first.
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