C058A

Brake Booster Motor A Position Sensor Circuit Range/Performance

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Stiff brake pedal
Reduced braking performance
The brake system fault light comes on
Unusual noises from the brake booster area

Causes

Brake booster motor position sensor malfunction
Open or short circuit in wiring harness
Poor contact in sensor connectors
Brake booster motor malfunction
Problems with the brake system control unit

How to Fix

Check the sensor wiring harness and connectors for damage.
Check the resistance and signal of the position sensor
Replace position sensor if necessary
Check the operation of the brake booster motor
Scan the control unit for additional errors

Related codes

C058B C058C C058D