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DTC codes / U02xx · Lost communication with a control module / U025C

U025CLost Communication With Special Purpose Vehicle Control Module D

U025C is a generic network communication code indicating that one or more control modules have lost contact with the Special Purpose Vehicle Control Module D over the vehicle's data bus. The computer sets this code when it expects regular messages from that module but does not receive them within the required time window, often due to a wiring fault, power supply issue, or internal module failure.

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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