Error code
OBD2 U0039
OBD2U0039
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Vehicle Communication Bus B (Open).
Severity
severeDriving may be unsafe due to potential loss of communication between vehicle modules.
Summary
U0039 indicates an open circuit in Vehicle Area Network (VAN) data bus B, which is part of the communication system between different modules in the car.
Common Causes
- Open circuit in VAN data bus B
- Faulty connectors or wiring harness
Fixes
FAQ
What does U0039 mean?
U0039 indicates an open circuit in the VAN data bus B, which is crucial for communication between vehicle modules.
How do I fix U0039?
Fixing U0039 typically involves identifying and repairing the faulty wiring or connector related to the VAN data bus B. Professional diagnosis and repair are recommended.
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)