troubleshooting code help...

i took my 2003 pontiac grand prix gtp supercharged to auto zone. the code come back P0440.any suggestions.

The gas cap code. See link below. Check the gas cap to make sure it is tight and the seals are good. It may take a few drive cycles for the SES/CEL light to clear once corrective action is taken.

Click here (http://www.automotiveforums.com/vbulletin/showthread.php?t=622473)