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2000 Oldsmobile Silhouette Question: my service engine soon light stays on



zak, Livonia, MI, December 30, 2009, 12:02

my service engine light stays on. I have tightened by gas cap (maybe I need a new cap?). Could an additive to my gas make a difference. thanks

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  • Answer #1

    December 30, 2009, 13:23

    This is the check engine light, and it's reacting to a fault in your emissions control system. If the gas cap doesn't resolve the light, it will be something else, and you'll need diagnosis. A fuel additive is extremely unlikely to make a difference.


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