A check engine and slip indicator light is on when moving ?

Hello, There is likely a bad wheel sensor, but this could also be any part of the traction control system. Wheel speed sensors fail commonly, and diagnosing a wheel speed sensor as faulty is not difficult for a professional. Let me know if you have questions while diagnosing, otherwise, I'll leave a link to certified shops in your area. http://repairpal.com/toyota-within-10-miles-of-lanham-maryland-20706