C0566 – BMW DTC

BMW DTC C0566 – Brake Booster Solenoid Circuit/Open

DTC C0566 meaning on BMW

DTC C0566 on a BMW refers to a fault in the brake booster solenoid circuit, indicating an open circuit. The brake booster solenoid is responsible for controlling the vacuum pressure in the brake booster, which assists in applying the brakes. An open circuit means that there is a break in the electrical connection, preventing the solenoid from functioning properly.

BMW DTC C0566 symptoms

Symptoms of DTC C0566 on a BMW may include:

• Illuminated ABS warning light on the dashboard
• Decreased brake assist functionality
• Increased pedal effort required to brake

BMW DTC C0566 causes

Common causes of DTC C0566 on a BMW include:

• Faulty brake booster solenoid
• Wiring issues such as a short or open circuit
• Corrosion or poor connections in the circuit

BMW DTC C0566 seriousness

The seriousness of DTC C0566 on a BMW lies in the compromised brake assist functionality. If left unresolved, it can lead to unsafe braking conditions, potentially increasing the risk of accidents. It is important to address this issue promptly to ensure the vehicle’s braking system operates correctly.

How to diagnose DTC C0566 on BMW

To diagnose DTC C0566 on a BMW, a mechanic may perform the following steps:

1. Use a diagnostic scanner to retrieve the fault codes
2. Inspect the brake booster solenoid and its wiring for any visible damage
3. Test the solenoid for proper operation using a multimeter
4. Check for continuity in the circuit to identify any open or short circuits

How to fix DTC C0566 on BMW

To fix DTC C0566 on a BMW, the following steps may be taken:

1. Replace the faulty brake booster solenoid
2. Repair any damaged wiring or connectors in the circuit
3. Clear the fault codes using a diagnostic scanner
4. Test drive the vehicle to ensure the issue has been resolved

How to erase DTC C0566 on BMW

To erase DTC C0566 on a BMW, follow these steps:

1. Connect a diagnostic scanner to the vehicle’s OBD-II port
2. Access the scanner’s menu to clear the fault codes
3. Confirm the deletion of the DTC C0566 code
4. Disconnect the scanner and start the vehicle to ensure the code has been successfully erased

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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