Lets see I have a 2005 zx3, I bought it used with 60000 and now has a little over 65,000. This morning after starting the car and leaving it running to let the car to warm up, I came back out to see the check engine light on. The car sounds normal. I had the oil changed 2 days ago with Mobile 1 5w-20 Full synthetic and Mobile 1 oil filter. I checked the oil and it looks like they may have put a little more than the 4.88 quarts. Could this cause the check engine light to come on? Or could it be something else?