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DTC codes / U01xx · Lost communication with a control module / U0114

U0114Lost Communication With Four-Wheel Drive Clutch Control Module

U0114 is a generic communication fault indicating that the primary controller area network (CAN) bus has lost contact with the four-wheel drive clutch control module, which is the unit that engages and disengages the rear axle coupling on all-wheel-drive vehicles. The computer detected that the module stopped broadcasting its periodic status messages or failed to acknowledge a request within the expected time window, so it flagged the module as offline.

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.

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