What does code U0289 mean?

Q: What does code U0289 mean?

Lost Communication With DC/AC Converter Control Module B. U0289 is a network communication code indicating that a control module on the vehicle's data bus has lost contact with the DC/AC converter control module B, which is typically part of a power inverter system for accessories or hybrid components. The computer detected that expected periodic messages from this module stopped arriving within the required time window, setting the code and often illuminating the warning light.

DTC codes / U02xx · Lost communication with a control module / U0289

U0289Lost Communication With DC/AC Converter Control Module B

U0289 is a network communication code indicating that a control module on the vehicle's data bus has lost contact with the DC/AC converter control module B, which is typically part of a power inverter system for accessories or hybrid components. The computer detected that expected periodic messages from this module stopped arriving within the required time window, setting the code and often illuminating the warning light.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaLost communication with a control module

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