Error code
OBD2 U0018
OBD2U0018
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Medium Speed CAN Communication Bus (shorted to Bus).
Severity
highDriving may be possible but could cause further damage to vehicle systems.
Summary
U0018 indicates that the medium-speed CAN communication bus is shorted to the data bus (+). This issue affects the Controller Area Network (CAN) data bus.
Common Causes
- Short circuit in the medium-speed CAN bus wiring
- Faulty connectors or terminals on the medium-speed CAN bus
Fixes
FAQ
What does U0018 mean?
U0018 indicates a short circuit in the medium-speed CAN communication bus, which is part of the vehicle's Controller Area Network (CAN) system.
How do I fix U0018?
Fixing U0018 typically involves identifying and repairing the shorted wiring or replacing faulty connectors in the medium-speed CAN bus. Professional diagnosis is recommended to ensure proper repair.
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)