C0594

Brake Booster Motor A Performance

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$111–333 (est.)

Symptoms

Increased brake pedal force
Uneven braking
ABS/ESP light on
Reduced braking performance

Causes

Amplifier motor malfunction
Wiring harness damage
Oxidation of connector contacts
Problems with the control module
Mechanical wear of the unit

How to Fix

Diagnostics of wiring harness and connectors
Checking the voltage on the amplifier motor
Testing an electric motor on a stand
Replacing a faulty component (motor, harness or module)
Resetting the error and checking the system operation

Related codes

C0595 C0596 C0050 C0051