Q&A

I had the same symptoms on my car, turned out to be warped rotors. You can remove them and have them resurfaced or you can purchase new ones. Also if your pads are beginning to screech or indicate that it is time to change them I would do so as well.

Usually your break piston presses against the pad and the pad stays consistently close to the rotor, I am not sure by "caliper is not disengaged"