Fault Code U0257
Code meaning, symptoms, possible causes, part number, and estimated cost.
U0257
Lost Communication With Body Control Module 'Q'
This code indicates a loss of communication between the main Body Control Module (BCM) and a sub-module designated as 'Q'. This can affect many comfort and safety-related functions in the vehicle.
Part Details
Part Name
Body Control Module (BCM) and/or Sub-Module 'Q'
Reference P/N (OEM)
N/A
General part number for this fault code — not necessarily for your specific vehicle
Estimated Cost
₪700 - ₪3500
Engine Location
Cabin/Engine compartment
Symptoms
- Various electrical and electronic malfunctions
- Warning lights on the dashboard
- Unresponsive certain systems (windows, locks)
- Starting difficulties or sudden engine shutdown
Possible Causes
- 1Faulty wiring or connector between modules
- 2Defective BCM module
- 3Defective sub-module 'Q'
- 4Power supply issue to the modules
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