Purge valve issue, error code 0442

I have a 04 Quest that has service engine soon light. Had the codes checked and it is 0442, dealing with the purge valve. My question is, where is it located, and what about the pressure controller could that be an issue as well? Thanks.

For technical questions and
For technical questions and diagrams refer to the factory service manual, http://www.nicoclub.com/FSM/quest/2004_Quest/ec.pdf page 326. You could also visit autozone repair manual for diagrams.