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U0037: Vehicle Communication Bus B

What Does U0037 Mean?

U0037 is a diagnostic trouble code indicating: Vehicle Communication Bus B. This code relates to the network communication 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

U0032 Vehicle Communication Bus A (+) High U0033 Vehicle Communication Bus A (-) Open U0034 Vehicle Communication Bus A (-) Low U0035 Vehicle Communication Bus A (-) High U0036 Vehicle Communication Bus A (-) shorted to Bus A (+) U0038 Vehicle Communication Bus B Performance U0039 Vehicle Communication Bus B (+) Open U0040 Vehicle Communication Bus B (+) Low