I dont know if this is a common problem or not. But I was driving the other day in tip mode and approached a stoplight. As it turns green I accelerate normally, tried to shift into second and it wont go up... it just stays in first. When I drive on D, and switch over to tip, i can down shift to 4,3,2, etc...Did a diagnostic check and no codes went off... Anyone here have this problem? is my trans going out on me? i would appreciate any assistance, tips, and feedback.