What does code U049D mean?

Q: What does code U049D mean?

Invalid Data Received From Glow Plug Control Module 2. U049D means the engine control module (ECM) or another controller on the network received invalid or implausible data from the glow plug control module 2 over the controller area network (CAN) bus. The computer detected a message from that module that was missing expected values, out of range, or corrupted, so it flagged the communication as unreliable rather than completely absent.

DTC codes / U04xx · Invalid data received from a module / U049D

U049DInvalid Data Received From Glow Plug Control Module 2

U049D means the engine control module (ECM) or another controller on the network received invalid or implausible data from the glow plug control module 2 over the controller area network (CAN) bus. The computer detected a message from that module that was missing expected values, out of range, or corrupted, so it flagged the communication as unreliable rather than completely absent.

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.