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Discussion Starter #1
someone told me you get worse mpg with the check engine light is on, whether or not something is wrong with it. true?
 
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Discussion Starter #2
If there is nothing wrong it shouldn't change your mileage. It would depend on the reason for the light.
 

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The Anti-RUB
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The check engine light can mean alot of things ranging from the Oxygen Sensor manfunction, or the PCM itself is messed up (happened to me). I would take it to a dealer and have them check it out...

It could have an even worse effect then just bad gas milage...

Good luck...
 
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