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Mechanical FAQ > Mechanical Questions > What does it mean if my "check engine" or "service engine soon" light comes on?

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There are many sensors and computerized components that manage your vehicle’s engine performance and emissions. When one of these fails, the "check engine" light is illuminated. Although your car may seem to run fine, it is important to have the issue addressed to prevent long-term problems.

Last updated on November 25, 2010 by DC Auto