I checked my CEL lights and came up 21-o2 sensor or circuit, 24- tps and 32-egr however I cant find an egr at any autoparts stores, any ideas? Also to describe my tranny issue, it shifts at 15,35 and 45 as high as I got it so far really right now, if I am under the shift point and let off gas when I push back on gas rpms have to rise to catch up and once it does then it will pick up speed again, when I try to romp on it then it will shift to finals gears rapidly. Any ideas