What does code U0241 mean?

Q: What does code U0241 mean?

Lost Communication With Headlamp Control Module A. U0241 is a network communication code indicating that a primary control module, usually the body control module or gateway, has stopped receiving valid controller area network (CAN) messages from the headlamp control module A. The computer detected a loss of the periodic heartbeat or data frames that the headlamp module normally broadcasts, which can be caused by a power, ground, or bus wiring fault rather than a failed module.

DTC codes / U02xx · Lost communication with a control module / U0241

U0241Lost Communication With Headlamp Control Module A

U0241 is a network communication code indicating that a primary control module, usually the body control module or gateway, has stopped receiving valid controller area network (CAN) messages from the headlamp control module A. The computer detected a loss of the periodic heartbeat or data frames that the headlamp module normally broadcasts, which can be caused by a power, ground, or bus wiring fault rather than a failed module.

SystemNetwork

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaLost communication with a control 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.