ECU Tuning & Fuel Management - Vent Solenoid or Purge Solenoid??????

My check engine light recently came on and so i took it to autozone for them to hook it up to their computer. They told me that it could be one of these two solenoids being bad. Does anybody know where these are located???Is it an easy replacement or will i have to get a mechanic. It is an 01 Civic LX

What specific code(s) were retrieved? Clear the code from the ECU to see if it returns before troubleshooting.