OnlyDaanish

So for over a month I have 2 codes for lean bank 2 and fuel trim malfunction on bank 2. The engine idles rough on cold and is slightly rough on warm. The startup is definetly harsh.

I can hear a loud his near the steering pump. (I think that's where the pcv valve is located but im not sure)

There are no o2 sensor codes so idk if it is faulty o2 or not. This morning I heard a knock sound coming from somewhere towards the passenger side. But it went away after a couple of seconds.

Could it be the pcv? O2 sensor?