U031C

Software Incompatibility With Brake System Control Module B

Severity

🔴 High

Can you drive?

Do not drive — repair immediately

Approx. repair cost

~$167 (est.)

Symptoms

Check Engine light comes on
Other related errors appear
Problems with the brake system
Reduced functionality of driving assistance systems
Unstable operation of the vehicle's electronic systems

Causes

Incompatible software versions between modules
Incorrect software update
Damage to module software
Installing incompatible hardware
Problems with communication between modules

How to Fix

Check software versions of all related modules
Update software to compatible versions
Reflash the brake control module
Check the integrity of the wiring harness and connections
Repair only from an authorized dealer

Related codes

U031B U031D U0121