The noise you hear is a vacuum leak from the power brake booster. It is leaking vacuum. That could be the cause of the hard stopping. It needs to be confirmed to be sure.
If it is, you will need to replace the booster.
As far as the ABS light, there is a malfunction in the electronic controls. A code is stored in the system. You can have this code read at a parts store for free. Once we know the code, it will give us a clue as to the area of failure. In most cases, it is a wheel speed sensor but needs to be confirmed.
Saturday, April 7th, 2018 AT 7:13 PM