What does code U0256 mean?

Q: What does code U0256 mean?

Lost Communication With Front Controls Interface Module A. U0256 is a network communication fault indicating that the module responsible for monitoring and controlling front-zone body functions has stopped reporting on the vehicle's controller area network (CAN) bus. The computer that stores this code has detected a loss of the periodic data messages it expects from the Front Controls Interface Module A, which typically handles climate, audio, and other front-occupant inputs.

DTC codes / U02xx · Lost communication with a control module / U0256

U0256Lost Communication With Front Controls Interface Module A

U0256 is a network communication fault indicating that the module responsible for monitoring and controlling front-zone body functions has stopped reporting on the vehicle's controller area network (CAN) bus. The computer that stores this code has detected a loss of the periodic data messages it expects from the Front Controls Interface Module A, which typically handles climate, audio, and other front-occupant inputs.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

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.