Why Can't the Brake Pedal Be Pressed Down?
2 Answers
The reasons why the brake pedal cannot be pressed down are: 1. There is a problem with the brake hydraulic system, causing excessive pressure. It is recommended to check the brake fluid and the booster system; 2. The newly replaced brake disc has not been properly adjusted, making it difficult to press down; 3. The vehicle has coasted after the engine was turned off, causing a fault in the vehicle's computer brake system. Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, and other transportation tools or machinery. The general principle of braking is to fix a wheel or disc on the high-speed shaft of the machine and install corresponding brake shoes, bands, or discs on the machine base, which generate braking torque under external force.
A couple of days ago, I was driving when suddenly the brake pedal became extremely stiff and hard to press, which really startled me. After looking into how the brake system works, I learned that car brakes rely on a vacuum booster to assist with reducing the effort needed. If the booster fails or the engine isn't running (resulting in no vacuum), the brake pedal becomes very difficult to press. Another common reason is insufficient brake fluid or a fluid leak, which leads to inadequate hydraulic pressure and makes the pedal hard to depress. I also noticed that if you press the brake immediately after parking, this can happen because the booster needs time to restore the vacuum. If you encounter this situation, never continue driving—pull over immediately and check the brake fluid level. If it's low, top it up, but it's still best to head straight to a repair shop to check for vacuum leaks. Safety is the top priority since it's a matter of life and death.
