Check enging light

  1. I had a mechanic using OBD on my car for check engine light and ESC light on not engaging code came back as brake switches A&B not working okay I replace them and the ESC is now engaged the light is off 3020 B of A p050 for brake switch and be correlation.
  2. I'm also showing a code P0455 and a P0455 pending and it says his evaporative emission system leak detected large leak how do I reset this?