Replacement OEM hybrid battery going bad after only 2+ years??

Discussion in 'Gen 2 Prius Main Forum' started by GreenMeanie, Sep 15, 2025 at 9:13 PM.

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  1. dolj

    dolj Senior Member

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    Actuator Assembly, Brake - Toyota (44500-47141). This part number replaces 44500-47140.

    The new (online) price for this part from Olathe Toyota is currently $1,209.83, which is discounted from the MSRP $1,627.04 (25.6% discount of $417.21)

    I'm not sure what's up with the website. It says this part is OEM Toyota Actuator Assembly, Brake For 2006-2009 Toyota Prius, but then over on the right, it says this part does not fit your vehicle. It is definitely the correct part number for a 2006 Prius.
     
    #21 dolj, Sep 16, 2025 at 10:30 PM
  2. rjparker

    rjparker Tu Humilde Sirviente

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    Hoover has good prices
    IMG_9814.jpeg
     
    #22 rjparker, Sep 16, 2025 at 11:47 PM
  3. Hayslayer

    Hayslayer Member

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    So the diagnostics came back with a C1256, which is accumulator low pressure. Exactly as expected. The alarm was only for about 2 seconds and then cleared. The car is functioning just fine.

    These are available online new from Toyota dealers for $1200ish. If I planned to keep the car, I would spend the money on a new one. You don't want to pay labor twice or more if a used one doesn't work correctly. Doing the job right takes a bit of time as there's also specific brake bleeding procedures and some minor programming to do. Anyone can do it half-assed and skip steps because "i don't think it's needed". Two days later you have a bunch of chirping from the brake system because all the air wasn't removed. There's only one right way to do it.

    Toyota 44500-47141 ACTUATOR Assembly, Brake
    • Production Date: 11/2005-03/2009
    • Fitting Vehicle Options: NHW20
     
    #23 Hayslayer, Sep 16, 2025 at 11:49 PM
    Last edited: Sep 16, 2025 at 11:55 PM
  4. Tombukt2

    Tombukt2 Senior Member

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    Brake actuator big hunk of aluminum
     
    #24 Tombukt2, Sep 17, 2025 at 7:06 AM
  5. GreenMeanie

    GreenMeanie Junior Member

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    Oof! A bit pricey. I should be able to run test tonight or tomorrow, so I can see if codes match.
     
    #25 GreenMeanie, Sep 17, 2025 at 6:01 PM
  6. GreenMeanie

    GreenMeanie Junior Member

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    Ok, so I got the reader and plugged it into the car. I have all the software downloaded. It says that it pairs with my phone, and the green light turned to solid blue. I was finally able to run the autoscan. It scanned through a long list of things, ticking up the percentage the whole time, and it got to 100%. Then, I got this error message about abnormal VCI function. I've done this three times and keep getting it. I also got the error message about communication status. I attach screenshots of both here. There's a green check mark by the VCI, and a steady blue light on the device. Thoughts?
     

    Attached Files:

    #26 GreenMeanie, Sep 18, 2025 at 5:45 PM
  7. rjparker

    rjparker Tu Humilde Sirviente

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    I might try it in Ready which will give you 13.5 to 14vdc.
     
    #27 rjparker, Sep 18, 2025 at 5:58 PM
  8. Hayslayer

    Hayslayer Member

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    If it's looking for Ignition-On, that is 2 presses of the power button with your foot NOT on the brake pedal.

    There are some ecu's (out of the typical 16 in the car) that don't always communicate properly when the car is in READY state.
     
    #28 Hayslayer, Sep 18, 2025 at 6:23 PM
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