What does code U0545 mean?

Q: What does code U0545 mean?

Invalid Data Received From Running Board Control Module A. U0545 is a communication fault indicating that a control module received invalid or corrupted data from the running board control module, which manages the deployable side steps on vehicles so equipped. The receiving module detected that the data frames from the running board module did not match the expected format or contained out-of-range values, so it flagged the signal as invalid rather than simply missing.

DTC codes / U05xx · Network communication / U0545

U0545Invalid Data Received From Running Board Control Module A

U0545 is a communication fault indicating that a control module received invalid or corrupted data from the running board control module, which manages the deployable side steps on vehicles so equipped. The receiving module detected that the data frames from the running board module did not match the expected format or contained out-of-range values, so it flagged the signal as invalid rather than simply missing.

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.