U0055: Vehicle Communication Bus D
System
Network Communication
What Does U0055 Mean?
U0055 is a diagnostic trouble code indicating: Vehicle Communication Bus D. 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
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1
Find your vehicle above
Click your make and model for real owner reports and common causes specific to your vehicle.
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
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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
U0050
Vehicle Communication Bus C (+) High
U0051
Vehicle Communication Bus C (-) Open
U0052
Vehicle Communication Bus C (-) Low
U0053
Vehicle Communication Bus C (-) High
U0054
Vehicle Communication Bus C (-) shorted to Bus C (+)
U0056
Vehicle Communication Bus D Performance
U0057
Vehicle Communication Bus D (+) Open
U0058
Vehicle Communication Bus D (+) Low