What does code U0577 mean?

Q: What does code U0577 mean?

Invalid Data Received From Lighting Driver Control Module D. U0577 is a communication fault where the lighting driver control module D reports data that the main body computer judges invalid or out of range. The computer has received a message from that module but the message content fails its internal plausibility or checksum checks, so it flags the data as untrustworthy rather than treating it as a total loss of communication.

DTC codes / U05xx · Network communication / U0577

U0577Invalid Data Received From Lighting Driver Control Module D

U0577 is a communication fault where the lighting driver control module D reports data that the main body computer judges invalid or out of range. The computer has received a message from that module but the message content fails its internal plausibility or checksum checks, so it flags the data as untrustworthy rather than treating it as a total loss of communication.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaNetwork communication

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.