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What would cause the emissions light to be on in a Kia Sedona?

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March 24, 2007 3:03AM

I have a 2003 Kia Sedona. The light was on, but my code reader would not read the code. So, I brought the car to the dealer who found the gas cap was loose (actually the retaining strap had caught under the cap). I would like to know why my code reader that I bought from Harbor Freight could not read the code (it said error). The reader works fine on America cars and Hyundai's. You bought A CODE READER!!!!! Not a scantool/it's like night and day. If it is a Vehicle manufacturer specific code it will not show on a aftermarket code reader unless you buy the good stuff!