MAF, MAP AND OTHER CODES?

Initially the battery was bad so we replaced it. We had a turbo code P2563 related to the turbo sensor. Once you takeoff it will put you in limp mode. You deleted then and you can drive all day no issues. Then I found that the turbo boot was torn and tapped from before, so I replaced it and gotten much less of that code and started to getMAF code. Cleaned the maf sensors and then had the map code, cleaned both, But then thought for a minute, the air filters were K&N and the housing where one sits in has broken tabs so does not fully seat sealed. So I removed both and both were dirty so washed them and left them to dry (they are the washable ones) then had my son drive the car without the filters and rpm was fluctuating and died on him twice and got the map code. I am in loss on where to go from here. If the air filter housing was after the MAF I would have said that the housing affects the maf reading but its before so I doubt has anything to do with it, not sure why all of a sudden the maf and map are popping more and more. I know its common on Nissans but not sure what the solution is