I've got a 2001 Toyota Sequoia Limited 4x4. The VSC/Off & VSC/Trac lights keep coming on and while driving, the "Skid" light comes on and anti-lock brakes lightly engage. I cannot clear the C1234 (YAW rate sensor), even after the dealer tried to reset, update and recalibrate. I've been told it is likely the YAW rate sensor itself, or maybe a ABS sensor on one of the wheels. What would you try next?