2001 Toyota Camry Emissions Problem

Below is what shows for P0440 . The Trouble code, trouble area and possible causes. So, start with buying a new gas cap. Erase the code by removing the battery cable of the battery for 2 minutes and install it back. After driving around 30 miles and the check engine light does not come back on, you solved your problem. If the check engine light comes back ON, then there is another problem. The only expensive part that I know is the Charcoal canister assembly which is $275. Not including labor.