The car runs ok on the open highway, and the streets, but it is causing a smell from the back of the car after useage. My check engine light is on, and cruise control light is blinking, also the ABS light, and the brake light are on, and the traction light is on, and the rear diff erential light is blinking. What is the problem. It idles very rough, and the car shakes as I wait for a light to change.