My S2000 isn’t officially a project car but the Check Engine light just came on so I guess I’ll be working on it a little. What I don’t understand is it runs and drives fine and I know it’s not a loose gas cap. At first i was going to take it to AutoZone because they’ll read the code for free, but I decided to get an OBD-II code scanner and do it myself since the scanner is less than $30 and we have 2 cars with OBD-II. Also found w web page with good info on the Check Engine light and what it can mean when it comes on: http://www.squidoo.com/check-engine-light-on