Fault Code U0277
Code meaning, symptoms, possible causes, part number, and estimated cost.
U0277
Lost Communication with Trailer Brake Control Module
This code indicates a loss of communication between the main control unit (ECM/PCM) and the Trailer Brake Control Module. This fault can affect the braking function of an attached trailer.
Part Details
Part Name
Trailer Brake Control Module
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪800 - ₪2500
Engine Location
Behind dashboard/Near trailer
Symptoms
- Trailer brake warning light illuminated
- Trailer brakes not functioning
- Error messages on information display
- Inability to control trailer brakes
Possible Causes
- 1Internal failure of the Trailer Brake Control Module
- 2Faulty wiring or short circuit in the communication system (CAN)
- 3Loose or corroded connector
- 4Main control unit (ECM/PCM) failure
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