What does code U046C mean?

Q: What does code U046C mean?

Invalid Data Received From A/C Compressor Control Module. U046C indicates that a control module on the vehicle's controller area network (CAN) received data from the air conditioning (A/C) compressor control module that it judged invalid or out of range. The receiving module expected a plausible status or command message from the compressor module but instead saw missing, corrupted, or contradictory data, so it flagged the communication fault.

DTC codes / U04xx · Invalid data received from a module / U046C

U046CInvalid Data Received From A/C Compressor Control Module

U046C indicates that a control module on the vehicle's controller area network (CAN) received data from the air conditioning (A/C) compressor control module that it judged invalid or out of range. The receiving module expected a plausible status or command message from the compressor module but instead saw missing, corrupted, or contradictory data, so it flagged the communication fault.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

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.