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A flashing check engine light generally means something serious has gone wrong; you need to find a code scanner to find out what it is. If the light comes on for a while then goes off it means you have a problem and should check it out but it won't hurt to wait until you get to a shop or have a chance to check it yourself. Either way, you shouldn't waste a lot of time plugging it in to a code scanner.

You can borrow, rent or buy a code scanner at most auto parts retailers.

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Q: Why does your check engine light go on off on your 1994 ford explorer xlt?
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