Error code
OBD2 U0056
OBD2U0056
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Vehicle Communication Bus D (Performance).
Severity
moderateCan continue driving, but performance issues may arise.
Summary
U0056 indicates a performance issue with the Vehicle Area Network (VAN) data bus D, which is responsible for communication between various systems in your vehicle.
Common Causes
- Faulty VAN data bus connector or wiring
- Malfunctioning module connected to VAN data bus D
Fixes
FAQ
What does U0056 mean?
U0056 indicates a performance issue with the VAN data bus D, which is part of your vehicle's communication network.
How do I fix U0056?
The specific cause needs to be identified first. Common fixes include repairing or replacing faulty connectors and wiring related to the VAN data bus D.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus (Performance)
- U0003High Speed CAN Communication Bus (Open)
- U0004High Speed CAN Communication Bus (Low)
- U0005High Speed CAN Communication Bus (High)
- U0006High Speed CAN Communication Bus (Open)
- U0007High Speed CAN Communication Bus (Low)
- U0008High Speed CAN Communication Bus (High)
- U0009High Speed CAN Communication Bus (shorted to Bus)
- U0010Medium Speed CAN Communication Bus
- U0011Medium Speed CAN Communication Bus (Performance)
- U0012Medium Speed CAN Communication Bus (Open)