U029B

Lost Communication With Drive Motor Control Module C

Severity

🔴 High

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–278 (est.)

Symptoms

Check Engine light comes on
Reduced vehicle power
Switching to emergency mode
Problems with battery charging (in hybrid cars)
Lack of response to the gas pedal

Causes

Open or short circuit in the communication circuit
Motor control module C fault
Module power problems
Corrosion or poor contact in connectors
Software error in the control unit

How to Fix

Check the integrity of the wiring harness and connectors
Check the power and ground of the control module
Scan all modules for additional errors
Flash or replace the control module if necessary
Repair only from an authorized dealer

Related codes

U029A U029C U029D