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2007 Toyota Corolla Question: My 2007 toyota had a battery and serpentine belt replacement now low gas mileage

 

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graciejames, Quincy, MA, February 04, 2014, 05:44
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Since repacing both gas mileage from 33 mpg to 27. Brought it back to repair shop tjey said the could not find anything wrong

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  • Answer #1

    pushrod February 04, 2014, 06:14
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    This is just a coincidence, your mpg would not have been affected by those parts being replaced! If they had knocked something loose, the check engine light would be on! Look elsewhere for a the loss of mpg, recheck it to start with while driving your routine daily travlels.

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    graciejames, February 04, 2014, 07:32
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    This has been going on for 3 weeks now starting with the first gas fill after the r\preventative repairs. Nothing else has changed. I have been reading about the ECU needing to be reset after replacing battery

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    pushrod, February 04, 2014, 07:46
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    No that's not true! The computer/ecu would have relearned those strategies before you got home!!!★ Also most professionals or repair shops use a power saver when battery is disconnected so that will not happen!! Recheck your mpg just to be sure.

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    graciejames, February 04, 2014, 08:47
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    thanks for your help but just filled up again yesterday...27 mpg...before battery replacement average 33...no good answer yet:)

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    pushrod, February 04, 2014, 10:02
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    Hope you get one! However there may not be one!!

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  • Answer #2

    Greg's Orange Auto (13428 Answers) , Orange, CA - (714) 361-9386
    globalhelper February 04, 2014, 06:37
     Master

    poss they reset computer when repl battery,fuel trim will take over and may repair itself

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    graciejames, February 04, 2014, 07:33
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    I hope so tho this has been going on for 3 weeks now since battery and serpentine belt replaced. thx

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