Hello, I have an is350 2011, I haven't done any suspension work to the car and two day ago this warning came out (check headlight system ) so I took it to the dealer and the checked the headlamps, wiring, computers, they even took the front bumper out and everything is working fine but the warning is till on. I checked the rear sensor that everyone talk about I place it up, down and middle and no results. Any advice or solution please. Thanks