A spongy brake pedal can result from ________

A spongy brake pedal is primarily caused by air trapped in the brake system. When air enters the brake lines, it can prevent the hydraulic fluid from creating the necessary pressure. This leads to a decrease in the pedal’s responsiveness and can make the pedal feel soft or spongy when pressure is applied. The presence of air disrupts the hydraulic pressure that is needed for effective braking, resulting in a diminished feel at the brake pedal.

In a properly functioning brake system, the hydraulic fluid should be incompressible, meaning that when you press the brake pedal, the force is transmitted directly and efficiently to the brake components. However, if there is air in the system, the pedal will not respond as it should, leading to that characteristic spongy feel. Proper bleeding of the brake system is essential to remove any trapped air and restore normal function.