What does code U0449 mean?

Q: What does code U0449 mean?

Invalid Data Received From Serial Data Gateway Module C. U0449 means the engine control module (ECM) or another primary controller has received invalid or corrupted data from the serial data gateway module C over the vehicle's controller area network (CAN) bus. The gateway module is a communication hub that translates and routes messages between different networks, and when its data fails checksum, framing, or plausibility checks, the receiving module stores this code.

DTC codes / U04xx · Invalid data received from a module / U0449

U0449Invalid Data Received From Serial Data Gateway Module C

U0449 means the engine control module (ECM) or another primary controller has received invalid or corrupted data from the serial data gateway module C over the vehicle's controller area network (CAN) bus. The gateway module is a communication hub that translates and routes messages between different networks, and when its data fails checksum, framing, or plausibility checks, the receiving module stores this code.

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.