Is it my MAF?

I had a "too lean (bank 1) and (bank 2)" code. I cleared the codes. The smell of gas stopped though when I changed the O2 sensors and it passed smog. The light is back on and i'm not completely sure of the codes it has but i know one of the codes is still (bank 1) too lean. All of a sudden it starts doing that whole stalling thing a couple months later. I let my buddy use my code reader and he'll bring it back tonight. Ill get you the codes this evening. Thank you for helping me out if you have any info for me.