What does code U0509 mean?

Q: What does code U0509 mean?

Invalid Data Received From Seat Control Module A. U0509 means the vehicle's main network gateway or a control module expected a valid data message from Seat Control Module A and received corrupted, missing, or implausible information instead. The module that set the code is not necessarily the seat module itself; it is the one that noticed the seat module's data was invalid on the controller area network (CAN) bus.

DTC codes / U05xx · Network communication / U0509

U0509Invalid Data Received From Seat Control Module A

U0509 means the vehicle's main network gateway or a control module expected a valid data message from Seat Control Module A and received corrupted, missing, or implausible information instead. The module that set the code is not necessarily the seat module itself; it is the one that noticed the seat module's data was invalid on the controller area network (CAN) bus.

SystemNetwork

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaNetwork communication

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