Question about 2001 Hyundai XG300

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The engine light has come on - 2001 Hyundai XG300

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Hello,

The engine light comes on when there is a problem inside the unit. The problem might be as a result of any problem in the engine. Most of the time it is as a result of a faulty oxygen sensor. Some times it does not affect the car, but if it is a major problem it will affect the fuel and air ratio.

This is what the engine light means and how it might affect the car.

WHAT THE LIGHT MEANS
The "check engine" light is part of your car's so-called onboard diagnostics (OBD) system. Since the 1980s, computers increasingly have controlled and monitored vehicle performance, regulating such variables as engine speed (RPM), fuel mixture, and ignition timing. In some cars, the computer also tells the automatic transmission when to shift.
When it finds a problem in the electronic-control system that it can't correct, the computer turns on a yellow warning indicator that's labeled "check engine," "service engine soon" or "check power train." Or the light may be nothing more than a picture of an engine, known as the International Check Engine Symbol, perhaps with the word "Check."
In addition to turning on the light, the computer stores a "trouble code" in its memory that identifies the source of the problem, such as a malfunctioning sensor or a misfiring engine. The code can be read with an electronic scan tool or a diagnostic computer, standard equipment in auto repair shops. There are also a number of relatively inexpensive code readers that are designed for do-it-yourself.
Manufacturers originally used the OBD system to help technicians pinpoint and troubleshoot malfunctions. But the systems now are required under federal laws governing automotive emissions. Although larger trucks have been exempt from the requirement, that quickly is changing.
"The 'check engine' light is reserved only for power train problems that could have an impact on the emissions systems," says John Van Gilder, General Motors' lead OBD development engineer.
Exactly what the OBD system looks for depends on the make, model and year. The original
systems varied widely in their capabilities. Some did little more than check whether the various electronic sensors and actuators were hooked up and working.
That changed by 1996, when, under OBD II regulations, car makers were required to install a much more sophisticated system that essentially acts like a built-in state emissions testing station. The computer monitors and adjusts dozens of components and processes.
For example, it continually samples exhaust emissions as they come out of the engine and again when they leave the catalytic converter, a device that removes carbon monoxide and hydrocarbon pollutants from the exhaust. The system also monitors your car's fuel system to ensure that gasoline vapors are not escaping into the atmosphere through a leak or even a loose or missing gas cap. In most cases, if a problem occurs, the computer will wait to see if it corrects itself before turning on the light. Modern OBD II systems are so thorough that state testing centers increasingly are checking for any stored trouble codes and foregoing the traditional tailpipe emissions test.

Hope this helped.
Take care and good luck

Posted on Jan 04, 2011

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Go to the local parts store and have them scan it to see what code is set in the computer. You can work from there. Lee

Posted on Jan 04, 2011

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Need to have shop or auto parts do a fault scan to determine what failed. Could be simple glitch but don't put it off, if there's a problem "they don't fix themselves"

Posted on Jan 04, 2011

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Click the link below: -------


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But as why check engine light came up,for that issue there are few help link with solutions to correct the issue.========
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------------


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