What does engine light on saab 2007 9-5 2.3t mean

My SAAB mechanic said that it could mean one of 400 things. I took my 2005 Saab 9-5 Aero to Andrews of Princeton and had the electronic fuel injection box replaced. When they fail, the car will simply not start. I drove mine with the CHECK ENGINE LIGHT on for two years with no incident. The short answer is: NO WORRIES. Take it in on your own schedule.