What does code U0290 mean?

DTC codes / U02xx · Lost communication with a control module / U0290

U0290Lost Communication With Active Aerodynamic Feature Control Module D

U0290 is a network communication code indicating that the primary control module (typically the engine control module or body control module) has lost the controller area network (CAN) signal from the active aerodynamic feature control module D. The computer detects this when it expects regular status messages from that module but receives no response for a set number of drive cycles, often due to a wiring fault, power loss, or module failure.

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.