Error code
OBD2 U0042
OBD2U0042
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Vehicle Communication Bus B (Open).
Severity
highDriving may be possible but could lead to further issues and should be addressed as soon as possible.
Summary
U0042 indicates an open circuit in the Vehicle Area Network (VAN) data bus B, which is part of the vehicle's communication system.
Common Causes
- Open circuit in VAN data bus B
- Faulty connectors or wiring harness
Fixes
FAQ
What does U0042 mean?
U0042 indicates an open circuit in the VAN data bus B, which is part of your vehicle's communication system.
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)