Hey scotty, i have a 05 kia spectra with the 2.0l dohc 4 banger. It's got 131 thousand miles and it's a stick shift. Lately I noticed a really bad lack of acceleration(takes forever for revs to climb) and after I hooked up my scan tool I got 4 codes:

P0447-evap system vent control circuit open

P2195-o2 sensor signal biased/stuck lean bank 1 sensor 1

P1166-o2 sensor system lambda controller at the limit 

P0171-system too lean bank 1

I saw that an o2 sensor costs 200 dollars I just wanted to get your opinion and also I noticed my car would stay in open loop even after Its completely warmed up it says I'm in open loop and the engine coolant temp doesn't go above 90°. I bought I new thermostat but I dont want to just throw parts at it, could you help me out?

Ps would love to take my car over to see you, I always watch your yt videos:)