What would cause the ets off light to come on in a 97 buick skylark?

My car has the same issue. The ETS light and the check engine light will come on intermitenly and stay on for weeks at a time, then turn off. It is a common problem with the PROM chip in your computer. You can drive the car with these lights on, but you will not have the traction system working. You can take your car to a mechanic and have the computer reset, which is a temporary fix. Or you can replace the PROM chip in your computer.