Why is my check engine light coming on? Here are five possibilities


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Most of us have seen it come on at some point, and when it does, the immediate reaction is to worry that you've got a major problem on your hands. While it is certainly important to find out why your check engine light is illuminating, it isn't necessarily a sign of looming disaster. Sometimes, the issue is very small.

If your light does turn on, you'll want to get to the shop quickly. Fortunately, modern auto shops have the kind of advanced diagnostic technology that will allow mechanics to figure out the problem quickly. There are a number of possible reasons that your check engine light might come on---some serious, some not so much. Here are five of the possibilities.

Faulty Ignition Coil

This helps to generate the spark that is necessary to get your engine fired up on all cylinders. Several things can go wrong with an ignition coil. They sometimes become faulty because of exposure to extreme temperatures. However, they can also go out as a result of standard wear and tear. When it does go bad, your car's sensors could see this as a reason to illuminate the check engine light.

Failing Battery or Charging System

Depending on the year that your car was manufactured, this could also be a cause of the light coming on.

Bad Mass Air Flow Sensor

This is what monitors the incoming air and then determines how much fuel to inject with it. If this is the issue that is causing your light to turn on, you're not in too bad of shape, as this is a part that makes for a relatively cheap fix.

Faulty Catalytic Convertor

This turns carbon monoxide into a less harmful emission. This, however, is a rather expensive fix. Because of the important role it plays in your vehicle's operations, it is necessary to get it taken care of quickly.

Loose Gas Cap

Wouldn't that be nice if this was the cause of your light turning on? A cap that fits poorly can lead to the evaporation of gas before it gets used, which can actually cause a check engine light to illuminate.

If your check engine light has turned on and you're in need of diagnostic services, be sure to get in touch with a reputable mechanic. For all forms of auto repair and auto maintenance in the Olympia area, the experts to contact are at Kohout's Automotive at (360) 383-5307. Go ahead and give Kohout's a call today!


Written By Brian Corey

Published By MORBiZ