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View Full Version : OEM P0440 troublecode


nairbnuapak
06/02/2012, 10:03 AM
Am trying to find the purge valve on my 1999 VX but not sure where it is or what it looks like. If anyone could help I would really appreciate it. Thanks.:confused:
Gizmo42
06/02/2012, 10:53 AM
P0440 is usually a loose or leaking gas cap. But the purge solenoid should be on the engine in front of and below the throttle body. This pic shows the hoses going to it. You should see a small hose coming from the manifold just below the PCV hose and going into a much larger hose. That goes into the purge solenoid.

http://i30.photobucket.com/albums/c337/Gizmo420/IMG_0508.jpg
Allison3371
01/31/2013, 11:02 AM
Wanted to make a note of the problem responsible for my very hard to diagnose P0440 code. He called it a fuel tank solenoid valve I believe. Near the gas tank. It wasn't the solenoid itself, but the wire that goes in to it had come undone. Took him hours to find it.
nocturnalVX
01/31/2013, 11:19 AM
Unfortunately I don't have pics to help you out, but I had that same recurring trouble code. A new gas cap didn't stop the code from coming back, and I ended up having the dealer service dept. fix it. One of the only times my regular mechanic (and a second go-to shop) failed to troubleshoot & fix a gremlin in my VX. No more code once the valve was replaced. Good luck!

Another thread... http://www.vehicross.info/forums/showthread.php?t=21364

P.S. Did anyone ever find out if it was a Thingamabob or a Doohickey?
Marlin
01/31/2013, 02:50 PM
Mine has been throwing a Po440 code for over 4 years now. Just buy yourself a scangage, reset it every few weeks as it pops up. I did the whole purge valve and gas cap blah blah blah and so on. Didn't work, only thing left is an electrical gremlin or that charcoal canister in the back. Probably the cansiter. But since it doesn't affect the truck at all, I choose to ignore it:) So if its gonna cost more than 100 bucks to fix, just ge tthe scangage, then you can monitor everything about your truck, realtime voltage, mpg speedo adjust for larger tires and so on. Plus, you can change the screen color to match your dash or you head unit:) It even has purple!! (That was for you Sue:) )
http://www.scangauge.com/products/scangaugeii/

Don't buy it there, it is much cheaper on Ebay.