The evap system is responsible for not allowing gas fumes from entering the atmosphere and reburning unburned fuel vapors. Most parts stores will tell you to replace the fuel cap at 12 - 15 dollars. However, in all my years (30) of working on cars, I think I found one bad cap.
You most likely have a leak in the system, just not the gas cap. I need to know the code they got, if it was a large or small leak detected. Chances are, I'm going to recommend that you take it to a mechanic and have the system fogged. They will actually put fog in the system and where the leak is, the fog will come out.
If you can, get that info for me.
Thursday, October 22nd, 2009 AT 8:04 AM