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Low Mpg After Battery Change

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My Battery died last week and since i put a new one in my MPG is showing around 25 - 30, where as it was showing 40 - 50 before,

is there a reason why this is happening?

im pretty sure the car is running around 40+MPG but the computer is saying less

is there a way to sort this?


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You could just disconnect the Battery again for a short while and see if it cures itself.

i think i read a post on here about the same problem not sure if there is some means of curing the fault without disconnecting the Battery.

Good luck.

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the computer has just reset its self,so if you not driven far it'll be low because you average is low,ie no long drives to bring the average up

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