Error code
OBD2 U0020
OBD2U0020
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Low Speed CAN Communication Bus (Performance).
Severity
highDriving may be possible but could lead to further issues. It's best to address this soon.
Summary
U0020 indicates a low-speed CAN communication bus performance issue, which affects data transmission between vehicle modules.
Common Causes
- CAN network malfunction
- Faulty connectors or wiring in the CAN system
Fixes
FAQ
What does U0020 mean?
U0020 indicates a problem with the low-speed CAN communication bus, which is crucial for data transmission between vehicle modules.
How serious is this issue?
This issue is considered high severity. While driving may be possible, it could lead to further problems and should be addressed soon.
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)