What does code U0085 mean?

Q: What does code U0085 mean?

Vehicle Communication Bus F - Open. U0085 indicates that the vehicle's communication network has detected an open circuit on Communication Bus F, which is one of the dedicated data buses used by modules to exchange information. The computer that monitors this bus has logged a fault because it cannot complete the expected electrical loop, meaning signals are not reaching all modules that rely on this bus.

DTC codes / U00xx · Network wiring and bus faults / U0085

U0085Vehicle Communication Bus F - Open

U0085 indicates that the vehicle's communication network has detected an open circuit on Communication Bus F, which is one of the dedicated data buses used by modules to exchange information. The computer that monitors this bus has logged a fault because it cannot complete the expected electrical loop, meaning signals are not reaching all modules that rely on this bus.

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.