Does anyone have an idea what could be wrong with my is250... two days ago the AC was blowing hot and cold. Then yesterday I was driving and all of a sudden the check engine light came on and the VSC and traction light was on along with the red triangle exclamation light and then the temperature was going back and forth from hot to cold fast then it will stay stuck all the way in cold then all of a sudden back to the red line. Then as soon as i exit the freeway at the stop light the car wouldn't accelerate I would have to turn off the car and turn back on to be able to drive. I drove it like that back home and waited for the car to cool off and noticed that there was no coolant in the car... does anyone know anything of this? Please HELP!

 

I recently had a similar issue. It ended up being my radiator.

 

Moved to 2IS forum.

 

‘Get a scan code reader. They are cheap. Hook it up. It will tell you the code. Highly likely emissions related such oxygen sensor or catalytic converter. You VSC and Trac go off when the check engine light goes on. Toyota is like that. Good luck.