Code PO440 Please help

[jas7865]

Im getting code #PO440,dont have a clue what this is,please help its on a 2000 grand prix 3.8 the code is descibed as a emissions evaperative control systems failure what does this mean.Thanks for your help

[BIG-L]

Here is a little bit about the P0440 code.

Could be something as easy as the cap is not tight or bad seal for the gas cap may need to be replaced,since it can also set that same code.

Question: Do you smell any gas while you are driving, especially when stopped at a light? If so, it's a bad solenoid not clearing out excess fuel vapor properly.

I just looked under the hood and noticed that the location of the solenoids is back around near the supercharger....it's a plug & play part.
There is a sticker on the undersided of the hood outlining the location of these solenoids.
The location may be a little different if you don't have a GTP...but still check under the hood and you should have a emissions sticker that will show you the vacumm routing which will help.


http://service.gm.com:8083/gmtechli...02e.html#story1