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U0025: Low Speed CAN Communication Bus (-) Low

What Does U0025 Mean?

U0025 is a diagnostic trouble code indicating: Low Speed CAN Communication Bus (-) Low. 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

U0020 Low Speed CAN Communication Bus Performance U0021 Low Speed CAN Communication Bus (+) Open U0022 Low Speed CAN Communication Bus (+) Low U0023 Low Speed CAN Communication Bus (+) High U0024 Low Speed CAN Communication Bus (-) Open U0026 Low Speed CAN Communication Bus (-) High U0027 Low Speed CAN Communication Bus (-) shorted to Bus (+) U0028 Vehicle Communication Bus A