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2007 Chevrolet Cobalt Question: What is the cheapest route to take if my check engine light stays on?

 

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Dee2007, Saint Paul, MN, August 19, 2013, 18:03
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I have a 2007 Chevy Cobalt with bare bone basics. The car rides fine, coolant level is were it should be, air filter is good, and gas cap is on properly. Could gasoline with a different blend and a higher octane amount cause this?

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