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The check engine light comes on when the main computer senses an error in something electronic such as a bad sensor or wire. The easiest way to see what it is is to go to autozone or a dealership or someone with a scan tool and have them read the codes from the vehicle. Autozone does it for free but a dealership will charge for it.

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โˆ™ 2006-04-21 23:51:56
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Q: What causes the check engine light to illuminate in a 1997 Eddie Bauer Expedition?
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