C0593

Brake Booster Motor B Phase U-V-W Current Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$111–333 (est.)

Symptoms

The brake system fault indicator lights up
Reduced braking performance
Unusual sounds when the brake booster is operating

Causes

Broken or damaged wiring harness to the brake booster motor
Brake booster motor malfunction
Problems with the brake control unit (ECU)
Short circuit in the circuit

How to Fix

Check the wiring harness for damage or breaks.
Check the resistance and voltage on the motor phases
Check the operation of the brake system control unit
If necessary, replace the brake booster motor or its components.

Related codes

C0591 C0592 C0594