Most of us have been frightened by the surprise appearance of the check engine light before. We have our fingers crossed that it is an easy and inexpensive fix. At the same time, some of us try to put it off and pretend like it's not even there. The truth is the check engine light could be signaling something more severe like engine damage. This infamous yellow engine light is usually a sign that your car needs repairs. Read below to learn about the five most common reasons why a check engine light might come on. Your Gas Cap Needs To Be Tightened This is the easiest fix for a check engine light problem. When a gas cap becomes loose, missing, or impaired, then it can trigger your check engine light. To ensure your gas doesn't evaporate, you should tighten it or replace it if it is missing or damaged.  You May Need to Replace the Oxygen (O2) Sensor This kind of problem is a common occurrence, and it can cause your gas mileage to drop up to 40 percent! When this critical ... read more