I'm working on a SDVE tune. Had question about difference in LTFT between banks. While working on VE tune I created 4 maps. LTFTB1, LTFTB2, STFTB1, and STFTB2. Basically Im looking at the short and long term fuel trims based off of MAP and RPM. What I noticed is that bank 1 has tons of cells filled in. All of the values are of course 0 because in the SDVE tune they are turned off. But the cells at least have values. With bank 2 only about 25% of the cells are filled in. I would think the same number of cells should be filled in for both banks. I am not getting any MIL lights at all. Do I have a trashed bank 2 O2 sensor.