What does code U01AE mean?

DTC codes / U01xx · Lost communication with a control module / U01AE

U01AELost Communication With Hybrid/EV Battery Interface Control Module O

U01AE is a generic network communication code indicating that one or more control modules have lost the CAN (Controller Area Network) data link with the Hybrid/EV Battery Interface Control Module O. The module that set the code expected a regular heartbeat message from the battery interface module and stopped receiving it, so it flagged the missing communication.

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.