What the Check Engine Light Could Mean

The check engine light has been the bane of existence for many car owners. When this light comes on, there is no need to panic. In the winter months, you may feel a little stressed at the thought of experiencing car trouble while traveling. Once you learn the true purpose of it and the possible meanings of its illumination, you can dispel many fears and you will be able to respond with the appropriate course of action. 

What is the Light For, Anyway?

The check engine light is a part of the onboard diagnostics system in your car. Cars are built with computers that monitor and control the performance of your engine, the mixture of fuel used, and the speed of the engine. It also monitors ignition timing and the shifting of the automatic transmission. Every problem that can occur with the car has its own series of codes that are in the computer. When a problem occurs, the check engine light will come on and the computer generates a code for the problem. Your ASE master mechanic can connect your car to their computer and read the code message. They use that message to determine which car repair to make. The light will illuminate for things such as a loose gas cap, worn out spark plugs and spark plug wires, malfunctioning oxygen sensor, or a blown head gasket.

What to Do When the Light Comes On

If the check engine light comes on, you need to check your car to determine the cause. The light does not always mean that you have a serious problem. When the light comes on, check to see if the light is blinking or remaining steady. If the light is steady, then your problem is minor. It could mean something as simple as your gas cap is loose or missing. If this is the case, just tighten the cap until you hear an audible click. If it is missing, you will be able to find one at your local auto parts store. A loose or missing gas cap will cause you to lose fuel and expel gasoline vapors in the air. If the light is blinking, then it means that you have a serious problem and you should take care of it immediately. A blinking light could mean that you have low oil pressure, which could cause overheating. If that happens, you should pull over as soon as it is safe to do so and shut off your engine. If you have AAA, you can call a tow truck and pull out your winter safety kits. In the winter, it is very important to pay close attention to the lights on your dashboard.         

Time for General Car Maintenance

If you notice your check engine light coming on, you should take your car to your mechanic. He has the proper tools and training for engine repair, fluid checks, and other vehicle repair and maintenance work. Your mechanic will also have access to a computer that will diagnose the codes generated by your car’s computer and will be able to perform the car repairs needed. He will know if you need minor repairs such as a fuel injection cleaning or major repairs such as faulty electrical systems. Regular maintenance will prevent many problems and keep you from seeing the dreaded check engine light.