Mazda Forum - Mazda Enthusiast Forums - 2004 Mazda tribute 3.0 that has 180k

Hello everyone . I have changed water pump , oil pan, intake manifold and valve cover gaskets , then i changed my oil and filter , when i put everything back car was not accelerating.
i have a 2004 mazda tribute 3.0 duratec engine 24 valve dohc . I have a hose that is quarter inc thick . that is coming from behind the engine on the driver side, about a feet and a half i do not know where it needs to connect . if it is going to help i had a code that i did not have before after i was done with my gaskets replacements, which was p2197 that tells me about o2 sensor signal stuck biased LEAN BANK 2 SENSOR 1. I do not think my sensor is bad . i just do not know where this hose goes. would anyone be able to tell me where this hose belong it has a u type of bend on top . I put couple pictures below to show where the hose is
https://cimg5.ibsrv.net/gimg/www.maz...a0638fe265.jpg
https://cimg7.ibsrv.net/gimg/www.maz...3a23965163.jpg
https://cimg8.ibsrv.net/gimg/www.maz...dc820d4bba.jpg
https://cimg9.ibsrv.net/gimg/www.maz...958c9ae396.jpg