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U0251: Lost Communication With Running Board Control Module B

What Does U0251 Mean?

U0251 is a diagnostic trouble code indicating: Lost Communication With Running Board Control Module B. This code relates to the manufacturer-specific network system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

What To Do Next

  1. 1
    Find your vehicle above

    Click your make and model for real owner reports and common causes specific to your vehicle.

  2. 2
    Check for recalls

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.

  3. 3
    Get a professional diagnosis

    A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

Related Codes

U0246 Lost Communication With Seat Control Module E U0247 Lost Communication With Seat Control Module F U0248 Lost Communication With Remote Accessory Module U0249 Lost Communication With Entertainment Control Module - Rear B U0250 Lost Communication With Impact Classification System Module U0252 Lost Communication With Lighting Control Module - Rear B U0253 Lost Communication With Accessory Protocol Interface Module U0254 Lost Communication With Remote Start Module