U04B4

Invalid Data Received From Brake Blending Actuator

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Incorrect operation of the braking system
Check Engine light comes on
Loss of braking efficiency
Uneven distribution of braking force

Causes

Brake actuator malfunction
Electrical problems
Wiring harness damage
Control unit software failure

How to Fix

Check the actuator electrical circuit
Check the condition of the wiring harness
Diagnose the brake actuator
Update control unit software

Related codes

U04B5 U04B3 U04B6