I just got my hum back from my mechanic he changed cv half shafts and replaced rear brakes.... I drove to school this morning and my traction control kept kicking in. It wasn't allowing me to really push brake pedal down which made for a pretty scary ride. I read somewhere it could be a wheel speed sensor? If that's the case could I change it myself because I don't want to take it back to mechanic because I just got it back. Any thoughts or advice on what to do would be great. Thanks guys