Q: Q: Service Engine Light

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My service engine soon light came on yesterday and i took it to autozone and said that i have an air leak causing me to burn more gas than usual. The gas cap was really loose so i tightened it up and also filled the gas tank. Service light still on. Checked my air filter and there is a small nick in the seal. Is it possible that that could be it?

My car has 90372 miles.
My car has an automatic transmission.

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