🔧 FixIt

C0566: Brake Booster Solenoid Circuit/Open

System
Chassis

What Does C0566 Mean?

C0566 is a diagnostic trouble code indicating: Brake Booster Solenoid Circuit/Open. This code relates to the chassis system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

What To Do Next

  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

C0561 Vacuum Sensor A/B Correlation C0562 Brake Pedal Position Sensor Supply Voltage Circuit/Open C0563 ABS Control Module Performance C0564 ABS Control Module System Voltage Low C0565 ABS Control Module System Voltage High C0567 Brake Booster Solenoid Circuit Low C0568 Brake Booster Solenoid Circuit High C0569 Brake Booster Solenoid Circuit Performance