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What Your Car is Saying When it Triggers the Check Engine Light

Last updated 6 years ago

The check engine light is an advanced warning system in your vehicle to let you know something is wrong. A variety of issues can cause your check engine light to turn on, so let’s look at a few of the most common triggers:

Emissions Issues

In 1996, a federal law was passed that required the on-board diagnostic systems of new cars to connect to their emissions output. If there is ever a problem with your emissions, then your check engine light will certainly turn on. A common problem with emission systems is a malfunctioning oxygen controller, and chances are that you won’t know it’s broken until you bring the car in for service!

Vacuum Leak

A vacuum leak occurs when a hose or manifold becomes warped, torn, or displaced. Vacuum leaks are not easy to spot and if this is the problem with your vehicle, then a smoke test can help diagnose it. Smoke is injected into an engine and if there are any leaks present, the white smoke will allow technicians to locate it with ease.

Fuel Injection Problems

Most cars on the road today are controlled by electronic fuel injection. This system makes it possible for the car to receive the proper amounts of fuel and air during combustion in the piston casing. If there is an issue with this system, then the check engine light will illuminate, but chances are that if the fuel injector is malfunctioning, then you’ll notice it immediately. Don’t drive with a potentially dangerous vehicle; when the check engine light turns on, head to your local automotive repair shop for service.

When you need automotive service, come to DeKalb Tire. We can have you back on the road in no time, so call us at (404) 252-9895 or visit our website for more information.


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