2000 Oldsmobile Silhouette Q&A

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

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 -
Answer 1
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. http://repairpal.com/check-engine-light -