Thanks for your fast reply.

If the o2 sensor will only cause a little difference in fuel comsumption, what is the possible problem for my high fuel consumption?

Also, do i need to reset the car after change the o2 sensor or anything? How to reset it?

Thanks.

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This post was auto-generated based upon a question asked on our tech article page here:

High fuel consumption could be too high of fuel pressure, a misfire or a leaking fuel injector.

- Nick