Gohanburne

As title states, it's winter and pretty cold here in Wisconsin. When I let my car sit for awhile like from the time I get to work to the time I go to lunch, I'll get in and start the car. The "Check VSC" flashes once and goes away. I'll go to my destination, hop back in the car, and start it with no issues at all. So, whatever is happening is only happening when the car sits in the cold for a prolonged period of time. I also have a suspension issue I can't seem to figure out too when the car sits in cold. I"ll get a single "knock" sound that I can feel in the gas pedal. Like the "Check VSC" message, it goes away when I restart the car.

Any idea what's going on? Its a 2006 IS250 AWD lowered on Megan springs 1.25".