U0039
Vehicle Communication Bus B (+) Open
DTC U0039, sometimes indicated as U003900 is an OBD diagnostic trouble code indicating a generic fault with the vehicle user network.
- U0039: Vehicle Communication Bus B (+) Open
- U0039: Vehicle area network (VAN) data bus B (+) – open circuit
- U0039 00: Vehicle area network (VAN) data bus B (+) - open circuit
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