what does "VSC=VSC OFF" on dash console on my 430 SC mean?

Means that the Vehicle Stability Control is deactivated. There is more than likely a button to turn it back on though. This explains what VSC does: Vehicle Stability Control (VSC) Helps prevent wheels from slipping sideways when cornering or sudden steering VSC is a system that helps prevent side skids and help stabilize the vehicle while turning on a curve. According to the National Highway Traffic Safety Administration's (NHTSA) report, vehicles equipped with VSC compared to those without can effectively reduce single-vehicle accidents by 35% for automobiles and 67% for Sport Utility Vehicles (SUV). When the vehicle senses a loss of traction or a slip, braking is automatically applied to all 4 individual wheels and engine power is reduced to help secure the safety of the vehicle. For example, if the steering wheel refuses to turn from over-speeding (under-steering), the vehicle will take control to steer toward the inner curve. Also, when the vehicle begins to spin from abrupt steering handling (over-steering), the vehicle will take control to steer toward the outer curve.

Does that answer your question, nancyknows??

This is an Awesome feature!

I had tires replaced and the next day an alignment and after that the VSC light can on.. It drives fine but the light will not go away. What do I do.

Thank you Racer-X!! I knew I’d read something about this in my owners manual but after leaving my car at the Lexus Dealership in Sarasota, Fl. overnight after they couldn’t explain to me exactly what those 2 buttons did or what it meant if I left them on. Thought I’d fair better to find an answer for myself. They told me they were an alert for me to change an air filter of some sort! Nothing to do with stability control at all. That’s why I questioned them & found out they know absolutely nothing about it. Less than me & that’s pretty bad as all I’ve ever done was skim through the owners manual. So you’d definitely recommend getting them fixed? Or just if u feel like u need them for the extra help in driving? I’ve never had any problems with this Lexus it actually doesn’t feel much like a sports car to begin with. The tires are low profile but not very wide. So I haven’t slipped at all actually. It would be a great car for a beginner who wanted a bit of a sportier feeling. But I definitely wouldn’t consider this to be a “sports car” by any stretch of the imagination.