[i] the check engine light on my 2005 Chevrolet Classic (Malibu) has been on for a while. I really didn't care until now I'm close to my emissions test deadline.[/i]
You should care. Not just because you may be adding unnecessarily to the pollution of the air you and the rest of us breath, but because you will never know when the car may have another message for you and that next message could be a warning that your car needs attention and without attention an important part may be about to fail.