C0581

Brake Booster Motor A Phase U-V-W Circuit High

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$167–444 (est.)

Symptoms

Hard braking
Increased brake pedal travel
The brake system fault indicator lights up
Reduced braking performance

Causes

Short circuit in the amplifier motor wiring harness
Brake booster motor malfunction
Damage to rotor position sensors
Problems with the brake booster control unit
Oxidation or corrosion of contacts in the phase circuit

How to Fix

Check the wiring harness for damage and short circuits.
Check the resistance of the motor windings
Diagnose rotor position sensors
Check the brake booster control unit
Replace faulty components

Related codes

C0582 C0583 C0584