What does code U0201 mean?

Q: What does code U0201 mean?

Lost Communication With 'Door Control Module C'. U0201 is a network communication fault indicating that the vehicle's main control modules have lost contact with the door control module designated as 'C' on the controller area network (CAN) bus. The computer has detected that expected periodic messages from this specific door module have stopped arriving within the required time window, which can affect door locks, windows, mirrors, and lighting functions tied to that door.

DTC codes / U02xx · Lost communication with a control module / U0201

U0201Lost Communication With 'Door Control Module C'

U0201 is a network communication fault indicating that the vehicle's main control modules have lost contact with the door control module designated as 'C' on the controller area network (CAN) bus. The computer has detected that expected periodic messages from this specific door module have stopped arriving within the required time window, which can affect door locks, windows, mirrors, and lighting functions tied to that door.

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.