I had a dodge guy tell me I could take my last two o2 sensors out to make my check engine go off from my offroad exhaust. I have mil eliminators on them, but the check engine still came on. But he just said take the last two out and pug them up with something and strap the o2 up under the car. He said the 02 sensor will read clean air and wont throw a check engine. Does anyone know about this?