Which sensor goes here? (pic)

[stereosilence]

I opened up my hood (trying to figure out how I'm going to change the valve cover gaskets) and I swear there used to be a sensor mounted to the air intake. There is a non-terminated hose in the area (the U shaped one near the dipstick), but I can't find a sensor or an electrical connector. I've been searching online, but I can't figure out what the name of the part is that should mount on this spot.

[NutriaforBreakfast]

That open hose I THink is for a venting of the automatic transmission

[ajcola]

You are correct NutriaforBreakfast