Ford Check Engine Light Diagnostic Service in Castle Rock, CO

You're driving down the road when suddenly you see a telltale engine-shaped light turn on in your vehicle's dashboard: the Check Engine Light. What does this light mean? What is the best way to respond when it turns on? At Castle Rock Ford, we want to help. Find out more about the Check Engine Light on this page. Then, come to Castle Rock Ford near The Pinery and Castle Pines, Colorado.

Why Is the Check Engine Light On?

The Check Engine Light turns on when a sensor tells the Engine Control Unit (ECU) that something is not as it should be. Since the ECU has a number of sensors giving it information, there are many reasons for this light to come on. Below, you will find a few of the most common causes, but keep in mind that other issues could be causing the light to turn on as well:

• Loose, Cracked, or Missing Fuel Cap
• O2 Sensor Failure
• Catalytic Converter Failure
• Faulty Mass Air Flow Sensor

• Spark Plug Failure
• Exhaust Gas Recirculation (EGR) Valve Trouble
• Engine Misfire
• Dying Battery