What does code U028F mean?

DTC codes / U02xx · Lost communication with a control module / U028F

U028FLost Communication With Active Aerodynamic Feature Control Module C

U028F is a network communication code indicating that a primary control module has lost contact with the Active Aerodynamic Feature Control Module C over the vehicle's data bus. The computer detects this when expected periodic messages from that module stop arriving within a defined timeout window, often setting the code after a few consecutive missed signals.

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.