What does code U0064 mean?

Q: What does code U0064 mean?

Vehicle Communication Bus E. U0064 is a generic network communication code indicating that the vehicle's computers cannot reliably exchange data on Communication Bus E, which is one of several high-speed data links used for modules such as the transmission control module and stability control. The computer that set the code detected a loss of expected messages or a bus fault on that specific network segment, not a failure of any single sensor or actuator.

DTC codes / U00xx · Network wiring and bus faults / U0064

U0064Vehicle Communication Bus E

U0064 is a generic network communication code indicating that the vehicle's computers cannot reliably exchange data on Communication Bus E, which is one of several high-speed data links used for modules such as the transmission control module and stability control. The computer that set the code detected a loss of expected messages or a bus fault on that specific network segment, not a failure of any single sensor or actuator.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

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.