Yesterday while driving the "VSC/ENGINE"lights came on.It was a very misty night and freezing cold.Now when start-up the car without the engine turning (only contact)the message comes dirrectly .One thing i have the Mazzuriheaders in my is250.
ANY IDEAS

 

Malfunctioning O2 sim? It's been awhile since I looked at the Mazzuri thread.

 

It may be
1. Your fuel cap wasn't tighten
2. Oxygen Sensor (Air fuel sensor)

 

check ur fuel cap noted above. make sure its tight and the vsc wont go away until after 50 miles of driving it. i was told by a lexus tech when that happen. hopefully its just the cap.