Question about 2000 Cadillac Seville SLS

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Why is the check engine light always coming on? I've had it checked and they always managed to fix it so that it would go off but now after about 6 months it's on again.

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Margie, The check engine light indicates a problem, usually with a sensor or which there are many. It could be that you have a new problem, or "they" didn't fix the original problem but simply erased the code from your cars ECM and it has flashed the same code again. You can purchase an OBD2 scanner for under $100. Fairly simple to use, and even if you are not mechanically inclined enough to fix the offending sensor, you will be an informed owner.

Posted on Nov 29, 2014

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Sometimes it's just humidity that causes the check engine light to turn on when nothing else is seemingly wrong with a car. I had a 1998 Buick LeSabre and I live in Wisconsin. When it would rain heavily or snow and sometimes even during a humid summer, the CEL would all-of-a-sudden turn on. Then it would mysteriously turn off sometime later--sometimes right away when the weather cleared up and sometimes it took weeks. At first I would spend Beacoup$$$
running back and forth to the mechanic; then I decided to get it checked for free at AutoZone--free diagnostics!! I then just kept my eye on it . I certainly didn't want to miss a Real problem. You also have an older car and this is what I would suggest that you do also.

Posted on Nov 29, 2014

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