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DTC codes / U02xx · Lost communication with a control module / U0249

U0249Lost Communication With Entertainment Control Module - Rear B

U0249 is a generic communication fault that sets when a control module on the vehicle's Controller Area Network (CAN) bus stops hearing regular status messages from the rear entertainment control module, often called the rear seat entertainment module. The module that monitors the bus, typically the body control module or gateway, has detected that the rear entertainment module is no longer responding or has dropped off the network entirely.

SystemNetwork
Code typeGeneric (all makes)
SeverityLow
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.

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