B0124 signals that the vehicle's body control network has detected a malfunction in the night vision camera system, such as a loss of communication or an internal error within the camera module. The code is stored when the control module cannot receive valid data from the night vision camera.
The camera assembly itself may have an internal electronic or sensor fault that prevents it from transmitting data.
Damaged, corroded, or disconnected wires between the camera and the body control module can interrupt communication.
Moisture or debris at the camera connector can cause intermittent or complete loss of signal.
A blown fuse, faulty relay, or bad ground can prevent the camera from powering up correctly.
Dirt, ice, or physical damage to the camera lens can degrade the image enough for the system to flag a fault.
The definition is universal; the diagnostics are engine-specific. Open your vehicle for the codes documented for it:
No. B0124 is a body‑system code related to the night vision camera; the PCM does not control this function. Replacing the PCM is unnecessary unless a separate PCM‑related code is also present.
Yes. Heavy contamination that prevents the camera from producing a usable image can trigger the fault code.
The vehicle remains drivable, but the night vision assist will be unavailable, reducing low‑light visibility assistance.
A capable OEM or advanced aftermarket scan tool that can access body‑control modules and display live data for the night vision system is required for full diagnosis.