What does code U0081 mean?

Q: What does code U0081 mean?

Vehicle Communication Bus F Performance. U0081 is a generic network communication code indicating that the vehicle's main communication bus, often the Controller Area Network (CAN), is not performing to the expected standard. The computer has detected that messages on this bus are corrupted, missing, or arriving outside their expected timing window, which can disrupt communication between multiple electronic modules.

DTC codes / U00xx · Network wiring and bus faults / U0081

U0081Vehicle Communication Bus F Performance

U0081 is a generic network communication code indicating that the vehicle's main communication bus, often the Controller Area Network (CAN), is not performing to the expected standard. The computer has detected that messages on this bus are corrupted, missing, or arriving outside their expected timing window, which can disrupt communication between multiple electronic modules.

SystemNetwork

Code typeGeneric (all makes)

SeverityHigh

Fix difficultyProfessional

AreaNetwork wiring and bus faults

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.