Vehicles nowadays are made safer and more efficient than ever before. However there are still plenty of things you will need to do to maintain the safety and efficiency of your vehicle. One of the most important aspects of caring for a vehicle is to pay attention to the check engine light. The check engine light is a warning that allows drivers to know that a part of the vehicle is damaged and must be repaired. It is incredibly important for helping you to maintain the overall safety of the vehicle. There are many different reasons why a check engine light can appear on your dashboard. These are just a few of the most common reasons why a check engine light comes on.The catalytic converter needs to be replaced.The air mass sensor is faulty.The oxygen sensor is not working correctly.The gas cap is missing or damaged.Spark plugs may be faulty and in need of changingEven though there are many different reasons why a check engine light may appear these are just a few of the most common reasons. When the check engine light appears it is extremely important to have it checked by a trained technician.