P0597 – BMW DTC

BMW DTC P0597 – Thermostat Heater Control Circuit/Open

DTC P0597 meaning on BMW

DTC P0597 on a BMW indicates an issue with the thermostat heater control circuit being open. This means that the powertrain control module (PCM) has detected an open circuit in the thermostat heater control circuit, preventing the thermostat from operating properly.

BMW DTC P0597 symptoms

Symptoms of DTC P0597 on a BMW may include:

• Engine running cooler than normal
• Check Engine Light (CEL) illuminated
• Decreased fuel efficiency

BMW DTC P0597 causes

Common causes of DTC P0597 on a BMW include:

• Faulty thermostat
• Open or short circuit in the thermostat heater control circuit
• Defective thermostat heater

BMW DTC P0597 seriousness

While DTC P0597 may not cause immediate drivability issues, it can lead to decreased engine performance and efficiency. It is important to address this issue promptly to prevent potential long-term damage to the engine.

How to diagnose DTC P0597 on BMW

To diagnose DTC P0597 on a BMW, a mechanic can perform the following steps:

1. Use a diagnostic scanner to retrieve the fault code
2. Inspect the thermostat and thermostat heater control circuit for any visible damage
3. Test the thermostat heater for continuity
4. Check for any loose or corroded electrical connections

How to fix DTC P0597 on BMW

To fix DTC P0597 on a BMW, the following steps can be taken:

1. Replace the faulty thermostat if necessary
2. Repair any open or short circuits in the thermostat heater control circuit
3. Replace the thermostat heater if it is defective
4. Clear the fault code and test the vehicle to ensure the issue has been resolved

How to erase DTC P0597 on BMW

To erase DTC P0597 on a BMW, follow these steps:

1. Use a diagnostic scanner to clear the fault code
2. Start the engine and ensure the Check Engine Light is no longer illuminated
3. Drive the vehicle to verify that the issue has been resolved

Recommended tools & DTC Scanners for BMW

Best Diagnostic App for modern BMWs: BimmerLink

Recommended Bluetooth adapter for Bimmerlink: OBDLink CX

Cable adapter for Bimmerlink: Enet Cable USB Type C

For older BMWs we recommend: Autel AutoLink AL319 (2024 version)

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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