What does code U0097 mean?

Q: What does code U0097 mean?

Vehicle Communication Bus H (-) Open. U0097 indicates that the vehicle's communication bus, specifically the H (-) line, has been detected as open by a control module. The computer monitors the bus voltage and expects to see a specific signal on the H (-) circuit; an open circuit means the wire is broken or disconnected, preventing normal communication between modules.

DTC codes / U00xx · Network wiring and bus faults / U0097

U0097Vehicle Communication Bus H (-) Open

U0097 indicates that the vehicle's communication bus, specifically the H (-) line, has been detected as open by a control module. The computer monitors the bus voltage and expects to see a specific signal on the H (-) circuit; an open circuit means the wire is broken or disconnected, preventing normal communication between modules.

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.