Has anyone had problems with their VSC Failure Warning Light? I have had this warning come up on my 06 LX470 several times within the last 6 months. The VSC TRAC and VSC OFF lights will come up on the dash. The manual says to take it to a Lexus Dealer which I have 2 times already. They didn't find any problems. Just today, the lights came back on. Its driving me crazy.