U01B3

Lost Communication With Brake Blending Actuator

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine Light Is On
Deterioration in braking performance
Disabling the regenerative braking system
An error message appears on the instrument panel
System transition to emergency mode

Causes

Broken or damaged wires in the communication circuit
Oxidation of contacts in connectors
Brake mix module malfunction
Module power problems
Software error in the ECU

How to Fix

Check the integrity of the wiring harness to the module
Inspect and clean the contacts in the connectors
Check the module supply voltage
Scan the module for additional errors
Repair only from an authorized dealer

Related codes

U01B2 U01B4 U0121