Check Engine Light When the check engine light comes on and won't go off, it is a sign that your vehicle's computer has detected some problem with the emission system. Determining the exact cause of the emission failure can only be done with a diagnostic scan. However, just because the light is on doesn't necessarily mean there is a big problem , because the light can be triggered by any one of a number of minor problems. At many autozones or O'Riley's they will take a special code reader and tell you what is wrong with your car for free.

see this chart troubleshooting and fix it.
God bless you
Check Engine or
Malfunction indicator light (MIL)
The Check Engine or Service Engine Soon light or an icon resembling the engine is called, in technical terms, the Malfunction Indicator Light or MIL. The MIL light comes on when your vehicle's computer detects a fault that can affect your vehicle's fuel economy and emissions. There is no button to reset the Check Engine light, but if the fault that caused it doesn't happen again, the light will turn off by itself. If the MIL light stays on, have the problem checked out, because in some cases, the problem could get worse if not repaired in time. Think of the Check Engine light as an early warning sign. To check why your MIL light came on, your dealer or mechanic will have to diagnose your car with a special scan tool.

Check engine light comes on and off, these are indication that there is some error code stored in your vehicles ECM. The engine module computer needs to be scanned. These will give the code and as per the error code the further problem can be detected and confirmed. The engine light indicator blinks or remains steady on dash when engine computer noticed any problem with any engine electrically operated components.

For more help, I suggest you to refer the help links provided below. These will let you know more about which areas to look, check, when there is engine light coming up on dash panel.

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

CHECK ENGINE LIGHT

http://alltypesofpartsreplacing.blogspot.com/2012/12/check-engine-lightengine-warning-light.html

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Check Engine Light Reset Procedure?
http://whoisbyme.blogspot.in/2012/06/check-engine-light-reset-procedure.html
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These will help.
Thanks.

The check engine light comes on when your vehicles on board computer detects an emissions related fault. if the light is flashing you are doing serious damage to your engine during operation if the light stays on steady then there is a problem with your vehicle causing it to pollute more. possible causes range from evap lines and purge valves to catalytic converters. best place to start would be to take the vehicle to a service facility to have the stored trouble code read.

Thanks for choosing FixYa and welcome to the site. Since your check engine light is on, you need to take it to Autozone or Advanced and have it scanned. The light is on because your computer detected a problem with the vehicle. When it flashes, it usually means major damage to the engine. They check it for free and they can tell you why it is on. This is your best bet because there are many reasons that the light comes ob. This way, you will know what is wrong and you won't be guessing or waisting money on parts you don't need.

Hi

When the check engine light comes on and then goes off after a while, means that the computer in yur car is detecting a problem that is not present all the time, this is called a -soft code- once the computer doesn't detect the problem, resets itself and the code is erased from memory and the check engine light goes of.

While the light is on, take the vehicle to an Autozone store, they will get the computer trouble codes and give you a print out of the problem. Like I said, It is important that you take the vehicle while the light is on, otherwise they may not detect the trouble.

Good luck