U012B

Lost Communication With Chassis Control Module B

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Possible problems with the operation of stabilization systems
Errors in other chassis-related systems
Reduced suspension functionality
In some cases, no obvious symptoms

Causes

Open or short circuit in the communication circuit
Poor contact in the module connector
Chassis control module B malfunction
Module power problems
Software errors 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 power supply and ground of the module
Test Chassis Control Module B
Update ECU software if necessary

Related codes

U0121 U0122 U012A