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magyarbacsi -> RE: Check Engine Light On and Problems Exhilerating? Help! (2/27/2007 8:23:34 PM)
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In a nut shell, todays cars run on what is called On Board Diagnistc generation II protocol, or OBDII. It is a thinking car and is constantly chacking the various components to operate. If the computer senses something is amiss and "thinks" something is wrong it automatically goes into a fail safe or limp mode. It keeps running but at a limited speed/rpm. This should generate a trouble code and the engine light comes on. Even if the problem goes away, there should be a code that you need to retrieve with a scanner. If it was bad gas. that is possible, the problem would still exist untill you've changed the fuel.
If you dont have a scanner, have it done at a shop. It may be nothing but a false trigger or something pending. You can purchase a scanner and get a good one for around $200. Two trips to a shop just to read the codes is about that. They are not that hard to learn to use. But if you are comfortable with the way the car runs now, wait till it happens again and then have it checked out. I dont like to take chances and have always addressed a potential problem in my driveway rather than 100 miles from home in the middle of no where.
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