Do You Know What Your 'check Engine' Light Is Telling You


by Karen McFarland


Experts state that one out of 15 vehicles inspected had its "check engine" light illuminated.

This light is one of the most vital components to a properly functioning vehicle. It alerts the driver to a variety of potential problems based on the vehicle's on-board diagnostic system.

It is possible that a system in your vehicle such as ignition, emission control, or even fuel injection is not operating at peak performance when the check engine light comes on even if it appears that your vehicle is running normally.

If there is a glowing red light, you should get the car checked out as soon as possible but it doesn't mean that you should immediately pull over to the side of the road. The engine components could be severely damaged if you ignore the warning light and it could incur additional repair expenses.

You should first check the gas cap to make sure that it wasn't left loose after refueling if your check engine light comes on. This can sometimes trigger the light. If the cap was loose, the light should go out after a few short trips.

As soon as possible, you should have the system checked if the light remains on. Indicating more severe condition that should be checked out immediately to prevent damage to the catalytic converter is a light that flashes. Upon experiencing a flashlight light, then you should minimize driving at high speeds or under heavy loads.

When scheduling service, make sure the automotive shop that diagnoses your car has professional technicians who are properly certified for OBD II (on-board diagnostic systems) diagnosis and repair. The technician will connect your vehicle's computer to a diagnostic computer, which will provide a "trouble" code indicating why the light was activated.

The idle speed, throttle response, engine temperature, fuel system pressure, manifold vacuum, exhaust emission levels and many other key indicators are the things the technician can check while the diagnostic computer is connected to your car.

Once the problem is diagnosed and fixed, your car's computer makes sure everything is back to normal, then turns off the check engine light.

It is recommended that reading your vehicle owner's manual and familiarizing yourself with the purpose of the check engine light and every other gauge and warning indicator on your dashboard.




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