P CODES (POWERTRAIN) P1400 - P1499 P1420 Questions

Hi, Afternoon. Last Weekend In My Vehicles Check Engine Light Came On Dashboard. Yesterday I Took It To Autozone And Their Scanner Showed...

Does Any Body Know What I Need To Do To Fix This Code? Please Help!!!!!!!!!!!!!

2003 Civic Hx 60 Miles, Only 1 Engine Option I Think. Over The Past 6 Months This Code P1420 Has Been Coming On. About Three Times Now...