My wife was using remote starter and when she got in the car inserted the key and noticed the MIL light on. She drove 3 miles from work to home and light stayed. I went to a mechanic and read fault 300, 301, 302 something to do with the firing order. Reset fault and was advised to do tune up. I didn't do nothing yet and light haven't resurface ever since! Wonder what trigger the sensor? Comment/advice is appreciated...