C0568

Brake Booster Solenoid Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$33–89 (est.)

Symptoms

Hard brake pedal
Reduced braking performance
Check Engine Light Is On
Unstable idle speed

Causes

Solenoid control circuit open
Oxidized contacts in the solenoid connector
Faulty brake booster solenoid
Short circuit in wiring harness
ECU problems (rare)

How to Fix

Check the integrity of the wiring harness to the solenoid
Check the voltage at the solenoid connector (12V when the ignition is turned on)
Check the solenoid circuit for an open circuit.
Clean the solenoid connector contacts
Replace brake booster solenoid if necessary

Related codes

C0561 C0567 C0569