U128D
Power Seat Control Unit Lost Communication With Gauge Control Module
U128D is an OBD-II diagnostic trouble code meaning: Power Seat Control Unit Lost Communication With Gauge Control Module. Common causes: broken or damaged can bus wires, seat control unit malfunction. Estimated repair cost: $33–167.
Symptoms
- Electric seat adjustments do not work
- Seat position settings not saved
- Fault indication on the dashboard
- Resetting the seat settings when the ignition is turned off
Causes
- Broken or damaged CAN bus wires
- Seat control unit malfunction
- Problems with power supply to the seat module
- Corrosion of connectors
- Instrument panel module malfunction
How to Fix
- Check the integrity of the CAN bus wiring between the modules
- Check the power and ground of the seat control unit
- Inspect connectors for corrosion or damage
- Scan other modules for related codes
- If necessary, replace the seat control unit
Related codes
FAQ
What does the U128D code mean?
U128D is an OBD-II diagnostic trouble code that indicates: Power Seat Control Unit Lost Communication With Gauge Control Module
What causes a U128D error code?
The most common causes of U128D include: Broken or damaged CAN bus wires; Seat control unit malfunction; Problems with power supply to the seat module; Corrosion of connectors.
How do I fix a U128D diagnostic trouble code?
To fix U128D: Check the integrity of the CAN bus wiring between the modules. Check the power and ground of the seat control unit. Inspect connectors for corrosion or damage. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U128D?
Yes, but get it checked soon
How much does it cost to fix U128D?
The estimated repair cost for U128D is $33–167. Actual cost depends on your vehicle, location, and labor rates.
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