The evap purge valve is located on top of the air box. It has both an electrical connection and two vacuum hoses. Before replacing it you might try cleaning it. Dump some carb cleaner in each end and shake it. This has worked for me a couple of times and sure beats the ~$100 for a new one. BTW, the CEL won't clear immediately, so give it a day or two after cleaning before declaring failure.
I had gotten a rejection sticker due to Code PO441. Did exactly what you said. bought some carburator cleaner and some hose clamps ($5). Expected to wait a couple of days, but an hour later, I noticed that my check engine lite was gone so I rushed to get it inspected and PASSED! Thank you, thank you!
I've gotten same code on my 2000 jetta. I've replaced the purge valve (easy 5 min job) and the gas cap, as well. Didn't clear my code. :/
Also, whenever I go to get gas (and ONLY then) my car struggles to start. i then pump the gas, and it will turn over. (rough...but then works itself out)
I'm thinking the only other thing left (other than a pinched hose...which I've checked for) is the charcoal canister. Just picked one off ebay for $49.99....so gonna put that in asap.
Any advice as to swap this out? Is there easy access through the trunk? Suggestions??