C057F

Brake Booster Motor A Phase U-V-W Circuit/Open

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$111–333 (est.)

Symptoms

Increased brake pedal force
The brake system fault indicator is on
Reduced braking performance

Causes

Open circuit of phase U, V or W
Wiring harness fault
Problems with the brake booster motor
Malfunction of the brake booster control unit

How to Fix

Check the integrity of the wiring harness
Check the resistance of the motor windings
Check connections and contacts in the circuit
If necessary, replace the electric motor or control unit

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