All right time for me to prove how little I know again. I took a recent trip to Florida and everything went well all the way down there (From Virginia approx. 900 miles give or take). Then on the way back up here the Service Engine Soon light popped on. The engine sounded it's normal loud self (I have a blown flex hose on the exhaust). Now this is the 2nd time it's happened the first time it happened it was after an oil change so I took it back to the shop my brother hooked the code reader to it and it threw a blank dummy code. So he reset the computer and I went on m marry way. I don't remember what code it threw that time but I was worried a bit this time being 800 miles away and knowing noone out there. So I kept driving. Well after a few hundred miles the Service Engine Soon light went out and hasn't been on since then (That was yesterday). Does anyone know what could possibly be causing this and what to do about it? The only thing I can think of is possibly the injector cleaner I used but I had run SEVERAL tanks of gas through it before the light cam on and I don't remember if I had used it anytime close to when my bro did the oil change. Any ideas or hints would be greatly appreciated.