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What is the B function for on the gear shift?

Discussion in 'Prius c Main Forum' started by Sara Lavendar, Aug 16, 2015.

  1. Sara Lavendar

    Sara Lavendar New Member

    Joined:
    Aug 11, 2015
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    Location:
    Toronto
    Vehicle:
    2012 Prius c
    I am wondering when I should use the B mode on my 2012 Prius C. Is it to prevent me from rolling too fast when I'm going down hills? Handling the car better in the snow? Thanks for your answers.
     
    #1 Sara Lavendar, Aug 16, 2015
  2. Mendel Leisk

    Mendel Leisk Senior Member

    Joined:
    Oct 17, 2010
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    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    If the Prius c is similar to Prius, B is only for extremely long downhill sections, to avoid the battery getting to the point that it's fully charged, and braking will then be handled just by the regular brakes, and they may get overtaxed, overheat.

    In almost EVERY day-to-day driving case, there's no need to use B. It's detrimental to mpg, reduces the battery charging too.
     
    #2 Mendel Leisk, Aug 16, 2015
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