SOURCE: Can you please tell me
most pvc valves are located in the valve cover, i believe yours is right on top, it has a hose going to the throttle body area
SOURCE: i have a 2001 hyundai elantra with a p0440 code.I
Sounds like you have done a lot of the right work here. I popped that code on my 2001 Elantra within the first 50k miles. Turns out that in my case the gas cap was the culprit. Keep reading though, maybe this still applies. My cap was still very new, and it's not that I forgot to put it on or to tighten it. The mechanic at the Hyundai dealership said this happened all the time to this car, and that you simply have to get the cap tighter. It has that ratcheting release so as to not over-tighten it, but here's the trick: Tighten as normal, allow a few clicks for good measure. Then, press in firmly against the cap and you'll see that you can get another 1/8 or so turn out of the cap. I popped this code 3 times total, the first time the dealer just reset the light. The second time was when he told me about this, and the last time was accidental on my wife's part. :) You can reset the light by simply removing the battery terminal... 30 minutes seemed to work for me... and then reattach. Of course it goes without saying that this is with the car off. Good luck!
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