What does code U048B mean?

DTC codes / U04xx · Invalid data received from a module / U048B

U048BInvalid Data Received From Headlamp Leveling Control Module B

The U048B code indicates that a control module on the vehicle's network received invalid or missing data from the headlamp leveling control module B. The computer detected a communication problem where the headlamp leveling module either sent corrupted data or failed to send expected messages, often due to a wiring fault or module malfunction.

SystemNetwork

Code typeGeneric (all makes)

SeverityLow

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.