U129C
F-CAN Malfunction EPS Control Unit and Driving Support System Control Unit
U129C is an OBD-II diagnostic trouble code meaning: F-CAN Malfunction EPS Control Unit and Driving Support System Control Unit. Common causes: broken or damaged can bus wires, corrosion of connectors. Estimated repair cost: $6–167.
Symptoms
- Check Engine Light Is On
- Disabling driver assistance systems
- Power steering problems
- Unstable operation of cruise control
- Errors in other CAN bus-related systems
Causes
- Broken or damaged CAN bus wires
- Corrosion of connectors
- EPS control unit malfunction
- Problems with the driving assistance systems control unit
- Poor ground contact
How to Fix
- Check the integrity of the CAN bus wiring
- Inspect connectors for corrosion
- Check power and ground of modules
- Scan all modules for additional errors
- If necessary, replace the faulty module
Related codes
FAQ
What does the U129C code mean?
U129C is an OBD-II diagnostic trouble code that indicates: F-CAN Malfunction EPS Control Unit and Driving Support System Control Unit
What causes a U129C error code?
The most common causes of U129C include: Broken or damaged CAN bus wires; Corrosion of connectors; EPS control unit malfunction; Problems with the driving assistance systems control unit.
How do I fix a U129C diagnostic trouble code?
To fix U129C: Check the integrity of the CAN bus wiring. Inspect connectors for corrosion. Check power and ground of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U129C?
Yes, but get it checked soon
How much does it cost to fix U129C?
The estimated repair cost for U129C is $6–167. Actual cost depends on your vehicle, location, and labor rates.
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