OBD-II code B0125 indicates a malfunction within the night vision control module circuit. This module processes infrared camera input to display a night vision image on the vehicle's display; the code sets when the module detects an internal fault, communication error, or circuit issue.
Internal failure of the module due to component degradation, moisture intrusion, or manufacturing defect is the most common cause.
Chafed, broken, or corroded wiring and loose or oxidized connectors in the module circuit can disrupt power, ground, or communication.
A blown fuse, relay failure, or voltage supply problem to the night vision module can cause the code to set.
High resistance or open in the module's ground circuit can prevent proper operation and trigger the fault.
After module replacement or vehicle programming, incorrect configuration or outdated software may cause a communication error.
In rare cases, a communication breakdown from the BCM or gateway module can mimic a night vision module fault, but the night vision module itself is far more likely.
Yes, the vehicle remains drivable. The night vision system is a driver-assistance feature; its failure does not affect basic vehicle operation, but you should rely on standard visibility and headlights.
Not necessarily. The code points to the control module, not the camera. However, a faulty camera can sometimes cause the module to set this code, so proper diagnosis is needed.
Not always. While the module is the most likely cause, wiring, power, or ground issues can also set this code. A thorough diagnosis should be performed before replacing any parts.
No. The PCM is not involved in the night vision system. This code is specific to the night vision control module circuit. Replacing the PCM will not fix a B0125 code.