C0566
Brake Booster Solenoid Circuit/Open
C0566 is an OBD-II diagnostic trouble code meaning: Brake Booster Solenoid Circuit/Open. Common causes: brake booster solenoid circuit open, solenoid malfunction. Estimated repair cost: $56–167.
Symptoms
- Stiff brake pedal
- Increased braking force
- Brake system fault light comes on
Causes
- Brake booster solenoid circuit open
- Solenoid malfunction
- Wiring harness damage
- Problems with the brake system control unit
How to Fix
- Check the integrity of the wiring harness to the solenoid
- Check solenoid resistance
- Replace solenoid if necessary
- Check the operation of the brake system control unit
Related codes
Error C0566 by Vehicle Brand
FAQ
What does the C0566 code mean?
C0566 is an OBD-II diagnostic trouble code that indicates: Brake Booster Solenoid Circuit/Open
What causes a C0566 error code?
The most common causes of C0566 include: Brake booster solenoid circuit open; Solenoid malfunction; Wiring harness damage; Problems with the brake system control unit.
How do I fix a C0566 diagnostic trouble code?
To fix C0566: Check the integrity of the wiring harness to the solenoid. Check solenoid resistance. Replace solenoid if necessary. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with C0566?
Limited driving only, diagnose soon
How much does it cost to fix C0566?
The estimated repair cost for C0566 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat