13 how to solve the hard braking of Peugeot 408?

The following is the solution of 13 Peugeot 408 hard braking: 1, restart the engine: try to press the brake pedal hard to restart, and the brake booster pump can restart the brake pedal only after the engine works normally. The following is detailed information about the causes of brake hardening:

1. Vacuum brake pump failure: the vacuum brake pump has two chambers, one connected to the intake manifold and the other connected to the outside atmosphere. When the engine is working, the intake manifold has a fast intake flow rate and produces negative pressure, which is the negative pressure chamber. The other positive pressure chamber is connected to the atmosphere. When braking is needed, the pressure difference between the two chambers is used to generate electricity. By applying pressure to the brake fluid, the friction between the brake pad and the brake disc generates braking force. If something goes wrong, braking will become difficult. 2. Brake booster pump problem: The brake booster pump will only generate vacuum when the engine is working, and when the engine is not working, it will only recover after restarting with the help of the previous vacuum.