the same thing is goin on with me only i know that its the left speed sensor. i've put a new on there, the trac/stab/abs/airbag/VSE lights would go off if i leave my car off for while but when i drive it for a lil the lights come back on. so i'm thinking i torqued it too much(which they told me to torque it to 118lbs) or the whole line is bad.