I posted the trouble tree for your code P0440 it means the computer detects a leak in the evap system. Which controls the fuel vapors it could be something as simple as a gas cap.I would make sure its tight and also inspect the seal on the gas cap for cracking etc. Its not just a you have this code replace this it has to be diagnosed. As you can see in the first steps of the trouble tree it has you use a scan tool and look at the readings. If you have a actual leak somewhere your going to have to use a smoke machine to force smoke into the system. Unless you get lucky and find a broken cracked or hose off. The smoke machines are very expensive I saw a guy on you tumbe make one with a fish pump halloween smoke machine some tubing and a cardboard box.I would have used a 5 gallon bucket with lid instead of the box.
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Wednesday, March 14th, 2012 AT 8:17 PM