Which issue is most likely to cause dragging brakes?

A defective vehicle load sensor is indeed linked to brake performance, particularly in systems that use load sensing to adjust brake pressure based on the vehicle's load. However, this issue is not the primary culprit for dragging brakes.

Dragging brakes primarily occur when the brake pads do not release fully, which can happen for various reasons. One of the more common causes is related to brake components sticking or binding due to contamination or mechanical failure. In the context of the choices provided, a dirty brake pad can cause friction that may lead to a dragging feeling, while worn-out brake rotors can also impact the smooth operation of the brake system. Low brake fluid levels can affect braking performance, but they do not directly cause the brakes to drag in the same way.

Understanding the core mechanics involved in the brake system helps clarify why a vehicle load sensor may not be the main issue causing dragging brakes. Issues such as brake pad contamination or rotor condition play a more direct role in this specific braking concern.