Error code
OBD2 U0049
OBD2U0049
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Vehicle Communication Bus C (Low).
Severity
highDriving may be possible but could lead to further issues if not addressed.
Summary
U0049 indicates that the Vehicle Area Network (VAN) data bus C has low voltage, which affects communication between modules in this network.
Common Causes
- Loose or corroded connectors on VAN data bus C
- Faulty power supply to VAN data bus C
Fixes
FAQ
How can I diagnose U0049?
Use a diagnostic tool like Torque Pro to check for other related codes and inspect connectors and wiring in the VAN data bus C area.
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)