C05BC

Brake Booster Motor B Position Sensor Supply Circuit/Open

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–222 (est.)

Symptoms

Increased brake pedal force
Brake system warning light comes on
Unstable operation of the brake booster

Causes

Open or short circuit in wiring harness
Brake booster motor position sensor fault B
Poor contact in the sensor connector
Malfunction of the brake system control unit

How to Fix

Check the wiring harness for breaks or damage
Check the contacts in the position sensor connector
Replace brake booster motor position sensor B if faulty.
Check the brake system control unit if necessary

Related codes

C05BA C05BB C05BD