1. The site is migrating to a new server this week, so there will likely be some downtime during that process. You can follow along here for updates.

2007 Prius w/150k miles, original battery - Hybrid synergy drive constantly running. Ideas why?

Discussion in 'Gen 2 Prius Main Forum' started by Warren CA, May 2, 2021.

  1. Warren CA

    Warren CA New Member

    Joined:
    Apr 26, 2021
    1
    0
    0
    Location:
    California
    Vehicle:
    2007 Prius
    Model:
    II
    My 2007 Prius w/150k miles and original battery has a problem with the Hybrid Synergy Drive constantly running every 10 seconds when driving and at park. Also has a thumping sound. Any ideas why this is happening? Suggestions on fixing?

     
    #1 Warren CA, May 2, 2021
  2. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    5,832
    5,614
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    Touring
    That's the brake actuator/accumulator running. Apparently you have a problem with pressure bleeding off. Pretty common problem.

    search Prius brake actuator and you'll get hundreds of hits.

    Sometimes it can be resolved by a brake fluid flush. Sometimes it's only a short term solution. If it gets to the point of getting the red triangle, it normally requires replacement of the actuator.
     
    #2 TMR-JWAP, May 3, 2021
    blaisep, Warren CA, ydpplqbd and 1 other person like this.
(You must log in or sign up to post here.)
Loading...
Similar Threads - Prius 150k miles
  1. ANfry

    Brake actuator failure 2006 Prius, 150k miles. Time to throw in the towel?

    ANfry, Nov 2, 2022, in forum: Gen 2 Prius Main Forum
    Replies:
    8
    Views:
    1,387
    Tombukt2
    Nov 3, 2022
  2. jackiek

    Buying used 2007 Prius 150K miles

    jackiek, Dec 13, 2019, in forum: Gen 2 Prius Main Forum
    Replies:
    7
    Views:
    2,409
    TMR-JWAP
    Jun 3, 2021
  3. bobloblaw4

    Advice on buying 06/07 prius with 100-150k miles

    bobloblaw4, Oct 29, 2019, in forum: Gen 2 Prius Main Forum
    Replies:
    6
    Views:
    1,843
    fotomoto
    Oct 30, 2019
  4. NickSP123

    My 2006 Prius hit 150K miles. Some questions

    NickSP123, Apr 12, 2018, in forum: Gen 2 Prius Main Forum
    Replies:
    11
    Views:
    2,488
    wjtracy
    Jul 6, 2019
  5. roflwaffle

    I'm looking for a higher mileage Prius (~100-150k miles), what problems should I watch out for?

    roflwaffle, Feb 23, 2012, in forum: Gen 2 Prius Main Forum
    Replies:
    10
    Views:
    2,947
    Wimble
    Feb 26, 2012