Engine question about my BMW X5 4.4l
 

Hi guys/girls,
can anyone please tell me if this solid plastic pipe needs to be connected somewhere. It's that curved pipe almost touching the radiator fan.
I'm also trying to solve an SES issue, P0444 Emission circuit open. I've googled and already replaced my gas cap but I still have that SES
Thanks in advance.

It's a vent for the front dif. It vents to the atmosphere and is just fine as you see it.

Thank you. I guess this is that hose
http://realoem.com/bmw/diagrams/u/x/192.png

now to focus on my purge valve issue.

P0444 fixed. What I did was I disconnected all the very snug hoses and removed the purge valve then applied 12v and it worked fine. All the hoses look perfect to me. I connected the hoses then ran the engine. I measured the voltage from the plug and it showed 10.5v. Maybe I should have tested the valve with that lower voltage but I didnt. Then I plugged the electrical back in while the engine is running hoping to feel the actuation of the valve but theres just too many moving parts at that point to feel one click. I went to the dashboard and the saw the SES disappeared. WTF. I dont know what worked but it cant be an issue with the plug because i've disconnected/connected that many times before. I'm thinking applying 12v to the valve loosened it up and started working again.
Well I just hope it lasts long enough for the state inspection. Can you guys tell me where to buy one of these purge valves? I looked at pelicanparts and it doesnt look like they have it.
Thanks

Good thing you provided images of it!lol it really gets me worried seeing something under the hood detached and i dunno where to put it back. i was about to call my dealer but good thing i research first because its hard to explain it thru phone especially if your not that techie person. thanks man! cheers!