Question about 2003 Chevrolet TrailBlazer

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Will 87 octane make my check engine light come on in my 03 t.b when i put fuel injector cleaner in it the light goes out

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It seems like the gas, but the more likely causes could either be a gas tank cap not sealing, and or the O2 sensor needs cleaned or replaced. There is not enough of a difference in the octane levels in the gas to cause a check engine light.

Posted on Jun 25, 2009

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Octane Myth


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