What does code U0239 mean?

Q: What does code U0239 mean?

Lost Communication With Entrapment Control Module A. U0239 is a network communication fault indicating that the module responsible for monitoring and controlling the vehicle's entrapment safety systems, such as power windows with anti-pinch and automatic closing doors, has stopped reporting on the CAN bus. The computer detected that it has lost all messages from this specific module for a set period, which can disable automatic closing features and trigger a warning.

DTC codes / U02xx · Lost communication with a control module / U0239

U0239Lost Communication With Entrapment Control Module A

U0239 is a network communication fault indicating that the module responsible for monitoring and controlling the vehicle's entrapment safety systems, such as power windows with anti-pinch and automatic closing doors, has stopped reporting on the CAN bus. The computer detected that it has lost all messages from this specific module for a set period, which can disable automatic closing features and trigger a warning.

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.