Abs actuator is bad, and only getting 33 mpg

Discussion in 'Gen 2 Prius Fuel Economy' started by GotanIssue12, Aug 4, 2021.

  1. GotanIssue12

    GotanIssue12 New Member

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    Could a bad abs actuator be the reason why my prius mpg is so bad?
     
  2. dolj

    dolj Senior Member

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    If your actuator problems mean there is no re-gen brake, that could affect your MPGs.
     
  3. ChapmanF

    ChapmanF Senior Member

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    Or if it applies the friction brakes when you wouldn't think.
     
  4. GotanIssue12

    GotanIssue12 New Member

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    okay. The abs motor pump is constantly having to run due to pressure leak. Could that be why it’s dropping 12-15+ mpg?
     
  5. bisco

    bisco cookie crumbler

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    probably not. how many miles on her?
    has she had correct maintenance?
    what was your mpg and when did it change?
    has your driving changed at all?
    anything else?
    so many things could be wrong on a 17 year old car
     
  6. TMR-JWAP

    TMR-JWAP Senior Member

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    I have seen where an ABS system is running almost nonstop due to leakage in the circuit going to the driver front brake. It was maintaining a low pressure on the caliper and causing a lot of heat. You could hear the fluid bypassing/leaking from under the car if your head was near the driver front. Not 13 mpg worth of heat, but it had to have been having some effect.
     
  7. koco

    koco Member

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    After recently having replaced the ABS actuator, the mpg did increase noticeably. It went from 35 mpg up to around 46 mpg.
     
  8. ChaseC

    ChaseC Junior Member

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    WOW! My MPG increased only about 10-15% after replacing the brake actuator. Not that I can complain as I'm getting 46-52 mpg now that fall has arrived. And that is on an original 16-year-old hybrid battery.
     
    koco likes this.
  9. Another

    Another Active Member

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    Just wondering. Have you recently done a Dr Prius check on your battery? How many miles on it? Mine is 14 years old with nearly 200k and fine. If I drive in colder weather, after ten minutes I’m back up in the 50s or better on mpg.
     
  10. ChaseC

    ChaseC Junior Member

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    I have not. It is the original battery though and the car has 95,500 miles on it. Thought of getting the Dr. Prius app and checking it, but decided ignorance is bliss instead.
     
  11. Another

    Another Active Member

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    That’s what Colonel Custer reportedly said as he approached the Little Bighorn.
    Dr. Prius app is free for basic tests.
     
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