Hi Friend, I don't have the answer, but wanted to validate the symptoms your RX is having.....mine is doing the EXACT same thing. Vehicle is '07 RX-350 , 76k miles, has " VSC, Traction Off, and Check Engine" light.....also idling a little rough with a slight "missfire" ??? It just started a couple days ago. If you have found the solution, I would love to know what you came up with...Thanks and Best of luck