4lights on my dash come on

[swanny]

So about once a week I will be driving and I have 4 lights turn on randomly on my 2006. The lights that come on are the "vsc off, traction, abs, vsc Tracy". Can anyone tell me why these turn on randomly? When I had keys made and showed the tech at Toyota the picture of the lights, he said it might be a sensor going out? If I stop and restart the vehicle the lights go away, except for the, flashing at startup. Thanks for any help.