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Engine brake stopped working

Discussion in 'Gen 3 Prius Technical Discussion' started by Zeus661, Jul 9, 2016.

  1. Zeus661

    Zeus661 Junior Member

    Joined:
    Mar 18, 2013
    36
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    Vehicle:
    2013 Prius
    Model:
    Two
    About 65000 miles on 2013 P3. Just noticed today the engine brake appears to not be working. Was driving down expressway and the car rolled almost like it was on cruise control when I took my foot off the gas. Rolled about half mile before MPH even dropped. Tried the engine brake and the B lights up but not braking. When I got to destination I shut it off for about 45 minutes and tried it again. This time everything seems normal except no engine braking when put in B. Any thoughts?
     
  2. WilDavis

    WilDavis Senior Member

    Joined:
    Feb 4, 2014
    2,489
    2,153
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    Location:
    Top RH Corner of RH Coast on L side of The Pond
    Vehicle:
    2009 Prius
    Model:
    II
    Any codes being flagged? …lights flashing???
     
  3. Zeus661

    Zeus661 Junior Member

    Joined:
    Mar 18, 2013
    36
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    0
    Vehicle:
    2013 Prius
    Model:
    Two
    No codes or lights. Everything else is normal.
     
  4. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    107,571
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    strange, try disconnecting the 12v neg for a few minutes.