tiaresanoe

so when I am driving I feel like this jerky sensation which I am pretty sure the truck switching gears. I have no idea about the mechanics of a car and would like to know what this is called and if anyone else is having this occur.
Also, I just changed my oil 2 weeks ago at the dealership and the button just came back on? Could this be a computer error or possibly the reason of jerkyness I am feeling while driving?