Lexus Troubleshooting Questions? Ask a Lexus Expert
Hello. Welcome to Just Answer. Please allow me to assist you. The Check Engine light is on because something is amiss in the engine management system, or the emission control system. The Slip light comes on because Lexus chooses to illuminate that light whenever the Check Engine light comes on. Please allow me to ask if the car is running normally; then we will proceed. Thanks
As long as it is running OK, it is most likely an emission control system. Please allow me to ask another question. Did you purchase fuel a day or so before the lights came on?