C05BB

Brake Booster Motor A Position Sensor Supply Circuit Range/Performance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Increased brake pedal force
Unstable operation of the brake booster

Causes

Brake booster motor position sensor malfunction
Open or short circuit in the power supply
Wiring Harness Problems
Brake booster motor malfunction

How to Fix

Check the integrity of the wiring harness and connections
Check the voltage in the sensor power circuit
Test the brake booster motor position sensor
If necessary, replace the brake booster sensor or motor.

Related codes

C05BC C05BD C05BE