U029B
Lost Communication With Drive Motor Control Module C
U029B is an OBD-II diagnostic trouble code meaning: Lost Communication With Drive Motor Control Module C. Common causes: open or short circuit in the communication circuit, motor control module c fault. Estimated repair cost: $56–278.
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
Error U029B by Vehicle Brand
FAQ
What does the U029B code mean?
U029B is an OBD-II diagnostic trouble code that indicates: Lost Communication With Drive Motor Control Module C
What causes a U029B error code?
The most common causes of U029B include: Open or short circuit in the communication circuit; Motor control module C fault; Module power problems; Corrosion or poor contact in connectors.
How do I fix a U029B diagnostic trouble code?
To fix U029B: Check the integrity of the wiring harness and connectors. Check the power and ground of the control module. Scan all modules for additional errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U029B?
Limited driving only, diagnose soon
How much does it cost to fix U029B?
The estimated repair cost for U029B is $56–278. Actual cost depends on your vehicle, location, and labor rates.
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