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honda civic 2007 . low gas mileage

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Old 07-15-2019
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honda civic 2007 . low gas mileage

Hi i have a Honda civic 2007 at and its mileage is really low ... Somewhere around 7 to 8 kmpl in city . how to deal with it... And at times in neutral my rpms keep shuffling up and down . Need help .
Old 07-16-2019
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Re: honda civic 2007 . low gas mileage

CEL on?
Old 07-16-2019
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Re: honda civic 2007 . low gas mileage

yes there is air fuel ratio error on the scanner ... And the cel is on

Last edited by Manasmakkar; 07-16-2019 at 06:16 AM.
Old 07-16-2019
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Re: honda civic 2007 . low gas mileage

well that could certainly cause fuel mileage problems. sensor probably needs to be replaced, make sure its plugged in first. and buy either a denso or ntk
Old 07-16-2019
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Re: honda civic 2007 . low gas mileage

Is it the upper sensor or the lower sensor ... There are 2 sensors .. The upper i mean near my engines face .. And lower below near the suspension
Old 07-16-2019
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Re: honda civic 2007 . low gas mileage

upper
Old 07-16-2019
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Re: honda civic 2007 . low gas mileage

Thanks alot .. How much does it effect the mileage .
Old 07-16-2019
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Re: honda civic 2007 . low gas mileage

It can reduce it by 20% or more.
Old 07-17-2019
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Re: honda civic 2007 . low gas mileage

Are you sure it is the upper one that goes faulty always .

Last edited by Manasmakkar; 07-17-2019 at 06:40 AM.
Old 07-17-2019
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Re: honda civic 2007 . low gas mileage

Originally Posted by Manasmakkar
Are you sure it is the upper one that goes faulty always .
Either one can go bad depends on what the CEL is and what kinda problems you are having. The upper one determines A/F ratio while the lower one checks to make sure catalytic converters is working properly.
Old 07-17-2019
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Re: honda civic 2007 . low gas mileage

It is an air fuel ratio error so hence it might be the upper one .Thanks for helping .
Old 07-17-2019
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Re: honda civic 2007 . low gas mileage

Originally Posted by Manasmakkar
It is an air fuel ratio error so hence it might be the upper one .Thanks for helping .
Yes the upper would be the problem and you are experiencing bad gas mileage which is another symptom of it being bad.
Old 07-17-2019
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Re: honda civic 2007 . low gas mileage

Ordered an upper one .. Today ..it is P0135 code the error

Last edited by Manasmakkar; 07-17-2019 at 08:52 AM.
Old 08-05-2019
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Re: honda civic 2007 . low gas mileage

P0135 even after air fuel ratio sensor change .
Old 08-05-2019
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Re: honda civic 2007 . low gas mileage

Originally Posted by Manasmakkar
P0135 even after air fuel ratio sensor change .
You did a ECU reset?

Denso or NTK sensor?
Old 08-09-2019
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Re: honda civic 2007 . low gas mileage

Its a denso .. The mechanic did clear the code after installing it through the sensor but it reappears . how to reset the ecu system ?
Old 08-09-2019
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Re: honda civic 2007 . low gas mileage

I had another issue today in which the ac fan motor was running slow and that lead the coolant to come out twice from reserve coolant box so i changed it. Would it again happen or was it just because of the ac fan running really slow .
Old 08-12-2019
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Re: honda civic 2007 . low gas mileage

My car overheats even after getting the car cooling system checked completely .
Old 08-13-2019
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Re: honda civic 2007 . low gas mileage

Head could be warped depending how bad it overheated.
Old 08-13-2019
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Re: honda civic 2007 . low gas mileage

I just got a head gasket changed a few days ago .But its even bad after the job done . however the temp Meter shows no signs of overheating even after the ac fan motor replacement but i feel the heat when i open the bonnet

Last edited by Manasmakkar; 08-14-2019 at 11:48 PM.
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