What does code U04BF mean?

Q: What does code U04BF mean?

Invalid Data Received From Drive Motor A Clutch Actuator. U04BF is a generic communication fault indicating that a control module received invalid or corrupted data from the clutch actuator of drive motor A, which is the traction motor in a hybrid or electric vehicle. The computer detected a message from the actuator that failed its internal plausibility or checksum validation, so the data could not be trusted for drivetrain coordination.

DTC codes / U04xx · Invalid data received from a module / U04BF

U04BFInvalid Data Received From Drive Motor A Clutch Actuator

U04BF is a generic communication fault indicating that a control module received invalid or corrupted data from the clutch actuator of drive motor A, which is the traction motor in a hybrid or electric vehicle. The computer detected a message from the actuator that failed its internal plausibility or checksum validation, so the data could not be trusted for drivetrain coordination.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyProfessional

AreaInvalid data received from a 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.