B0126 indicates a fault in the driver‑monitoring camera system, which is used to detect driver presence, eye‑glance, and head position for advanced safety functions. The PCM/ECU receives an abnormal signal from the camera or its wiring.
The camera itself has failed electrically or mechanically, producing out‑of‑range signals.
Loose pins, broken wires, or corrosion can interrupt communication with the control module.
A displaced camera or blockage by debris, stickers, or interior trim can cause abnormal readings.
A failing fuse, relay, or voltage regulator can supply incorrect voltage, triggering the fault.
Only after ruling out hardware issues should a malfunction in the body control module or PCM be considered.
In most cases no. The PCM is rarely the cause; the fault usually originates from the camera, its wiring, or power supply.
If the code is due to an obstructed or dirty lens, cleaning may resolve the issue, but a diagnostic scan is still required to confirm.
No. The code pertains to the driver‑monitoring camera and safety systems, not to engine operation.
Repair time varies with the cause; simple cleaning or connector reseating may take 30‑60 minutes, while replacing the camera module can require 1‑2 hours.