MPG Calibration

Discussion in 'Prius v Fuel Economy' started by Vinoh, Mar 2, 2012.

  1. Vinoh

    Vinoh Junior Member

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    It seems that most people (including myself) are experiencing an inaccuracy in the displayed average fuel economy reading of about 2-3 MPG too optimistic. Does anyone know of a way to enter a calibration value into the car using an OBD2 module? TIA

    --Dave
     
  2. F8L

    F8L Protecting Habitat & AG Lands

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    None that we know of. The error is quite common in most cars equipped with the technology and the error often appears larger with larger mpg numbers.
     
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  3. Vinoh

    Vinoh Junior Member

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    Ah, too bad. Certainly understandable why the manufacturers would want to err on the optimistic side though. Thanks!
     
  4. F8L

    F8L Protecting Habitat & AG Lands

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    Speedometers are optimistic from the factory too. :) Most speedometers are 1-2mph too fast. I'm not really sure why the mpg indicator is unless it is just a gimmick. The GenII was approx 2% optimistic and the GenIII 2010-2011 is between 4%-7% depending on whose records you review. We don't have enough data for the 2012 or Prius v to determine the error percentage yet.
     
  5. bat4255

    bat4255 2016 Prius v #2 and 2008 Gen II #2

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    I currently own a 2013 outback, and the same issue exists, HOWEVER there is a fix for the OB. They claim it takes a dealer to recalabrate, but it should be able to be done with out. All it is a setting than you need to jump through hoops through. I would think the same can be done with a Toyota.
     
  6. Sam Spade

    Sam Spade Senior Member

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    Who exactly is this "they" ??

    And I would think NOT......since this is the first that I've heard about being able to do it on ANY model.
    I follow Ford hybrids and the Volt fairly closely.....in addition to the Prii.
     
  7. royrose

    royrose Senior Member

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  8. bat4255

    bat4255 2016 Prius v #2 and 2008 Gen II #2

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    Subaru dealers

    Get your geek on in this thread :)

    Gen 5 Adjust MPG's - Subaru Outback - Subaru Outback Forums
     
    #8 bat4255, Dec 24, 2016
    Last edited: Dec 24, 2016
  9. Sam Spade

    Sam Spade Senior Member

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    OK but that has no bearing on any other brand of vehicle.
     
  10. bat4255

    bat4255 2016 Prius v #2 and 2008 Gen II #2

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    I think it does.
     
  11. bat4255

    bat4255 2016 Prius v #2 and 2008 Gen II #2

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    I think is does. Electronics are the same
     
  12. Sam Spade

    Sam Spade Senior Member

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    And I think that's a ridiculous statement.
    What evidence do you have that Subaru shares the exact same electronics with any other brand ??
     
  13. bat4255

    bat4255 2016 Prius v #2 and 2008 Gen II #2

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    See here

    Then why are you following these forums for answers?
     
  14. Sam Spade

    Sam Spade Senior Member

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    "See here"....what ???
    And what does that second sentence mean ??
    I come here mostly to learn stuff about my car, NOT to have to wade through drivel like this.
     
  15. bat4255

    bat4255 2016 Prius v #2 and 2008 Gen II #2

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    "Sam Spade, post: 2468528, member: 150028"
    And what does that second sentence mean ??
    You quoted



    You said you cannot recalibrate, I proved you wrong.

    Deal with it.
     
    #15 bat4255, Dec 24, 2016
    Last edited: Dec 24, 2016
  16. royrose

    royrose Senior Member

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    You have in no way proven that the fuel economy display can be re calibrated for any Toyota.

    And you are being unnecessarily argumentative. It is Christmas Eve and Hanukkah. Be nice.

    It is nice that it can be set in the Outback.
     
    #16 royrose, Dec 24, 2016
    Last edited: Dec 24, 2016
  17. bat4255

    bat4255 2016 Prius v #2 and 2008 Gen II #2

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    "And I think that's a ridiculous statement."

    So you think that comment didn't deserve a response, especially when he stated he was visiting othe forums with no answer to the same question?

    I simply provided another option. Too bad he did not like the answer.
     
    #17 bat4255, Dec 24, 2016
    Last edited: Dec 24, 2016
  18. Tideland Prius

    Tideland Prius Moderator of the North
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    There was no link in your "see here" post.

    And it's Christmas Eve, be a little more cheerful :)
     
  19. mikefocke

    mikefocke Prius v Three 2012, Avalon 2011

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    Bat.

    You didn't provide any specific information, just a claim based on some "they" that said it could be done.

    As one with decades of computer experience, I assure you you are theoretically right. You could access the code and change both the logic and comparison values.

    But your post failed to provide any how, where, price, or success story that matches the specific vehicles in this forum so until you do, your post is, while theoretically possible, less helpful than it might be.

    Doing so would void any warranty.

    I track my MPG using fuelly. I never look at the MPG displayed as an absolute. I rather look on one reading as relative to another within a margin of error. So personally, even if the fix/mod required 10 minutes and no cash I wouldn't bother.
     
  20. bat4255

    bat4255 2016 Prius v #2 and 2008 Gen II #2

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    "You didn't provide any specific information, just a claim based on some "they" that said it could be done."

    They refers to members at the Outback forum. I thought it was pretty obvious.


    "But your post failed to provide any how, where, price, or success story that matches the specific vehicles in this forum so until you do, your post is, while theoretically possible, less helpful than it might be."

    Did anybody read the provided link? Too much information to simply copy and past.
    Gen 5 Adjust MPG's - Subaru Outback - Subaru Outback Forums


    "Doing so would void any warranty."

    If it's done by the dealer, how does that void the warranty?



    I will try to provide more simple answers in the future