What might cause my 2011 Ford Expedition check engine light to come on?

Your 2011 Ford Expedition check engine warning light is designed to alert You to any issues or malfunctions with a variety of vehicle parts and systems. When Your Ford check engine light comes on, it can mean a few different things. The first thing You should check when Your check engine light comes on is Your gas cap. If the seal is broken due to a loose or damaged gas cap, the vapor could be leaking into the fuel-tank system, which causes the check engine light to turn on. If Your gas cap is working properly, the next thing You should check is Your engine oil level. A low oil level may cause Your check engine light to turn on because driving with a low oil level can cause engine damage.