U0241 signals that the vehicle's network has detected a loss of communication with the headlamp control module. The code is stored when the module fails to exchange messages on the CAN bus with other control units.
The module itself may have an internal fault that stops it from transmitting or receiving messages on the CAN bus.
Loose, corroded, or broken wires and connectors between the headlamp control module and the CAN network can interrupt communication.
A problem in the BCM can disrupt the bus and affect communication with the headlamp control module.
A break, high resistance, or poor termination anywhere on the CAN bus can cause multiple modules, including the headlamp control module, to appear offline.
Low voltage or a bad ground connection to the headlamp control module can prevent proper communication.
It means the vehicle's network detected that the headlamp control module is not communicating with other control modules.
A severely low battery voltage can affect module operation, but U0241 is typically triggered by communication faults rather than battery condition alone.
No. Replacing the powertrain control module is rarely required for this code; the issue is usually a faulty headlamp control module, wiring, or network problem.
Diagnosis and repair generally require one to two hours, depending on the extent of wiring or module failures found.