This we take seriously. Some times it is a small issue. You can check your owners manual for some help. You can bring your car in for a quick computer scan at NO COST when you print this article and bring it with you. It is wise to not let this condition go too long because there is a possibility that the problem can get worse. Also when there is a "drivability" problem indicated by the check engine light the motor is not at it's most efficient, causing less gas mileage and more pollution. Also the car will not pass smog when this light is on.