I've been having problems with a SES light that keeps coming on about a small evaporative emissions leak. Firstly thing I did was check to make sure it wasn't the gas cap. I don't believe it is since it's only about 3 years old and I triple checked to make sure it was on right. I then changed the EGR valve and this kept the light off and the car good for about 2 months. The light just recently popped back on and I'm at a loss for what it could possibly be. Any thoughts?

 

Vaccume line leak on something for the emissions, on one of the lines on top of the gas tank, or the pressure valve on the tank.