C0566

Q: Can I keep driving with this code?

The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.

Brake Booster Solenoid Circuit/Open

High severity

Open circuit on brake booster solenoid. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.

Common causes

Wiring break or coil open
One of the most commonly reported causes for this code — check this first.
high
Typical part cost: $170-1650
Pin pushed back out of connector body
Less common, but worth ruling out after the more likely causes.
low
Typical part cost: $170-1650
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First things to check

1Confirm the code with a scan tool and check for additional related codes.
2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.

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Related codes

See related trouble codes

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Frequently asked questions

What does C0566 mean?

C0566 means "Brake Booster Solenoid Circuit/Open". It is a generic OBD-II code that points to a fault in the chassis.

What are the most common causes of C0566?

wiring break or coil open; pin pushed back out of connector body; cracked solder joint inside the module or sensor — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.

Can I keep driving with this code?

This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly. Use the Wrenchify app for a full diagnosis specific to your vehicle.

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