2010 Prius Brake Booster Repair Question

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by hog_washington, Jul 28, 2021.

  1. hog_washington

    hog_washington New Member

    Joined:
    Jul 28, 2021
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    Location:
    Texas
    Vehicle:
    2010 Prius
    Model:
    N/A
    Hi All,

    I'm not great with cars, and it seems like this has been brought up a bunch on this form already, but I was hoping to get some more insight into my specific issue:

    After leaving my car at the airport for a few days, I came back and the ABS, SLP, Brake, (!) lights were all on (see picture). It seemed like the braking was abnormal, though functional, and it wasn't charging as I braked. I took it to the mechanic who ran diagnostics and came up with code C1391 (see picture) and told me I would need the Brake Booster Master Assembly with Skid Control ECU replaced for ~$3200.

    It seems I'm out of the window for the free replacement by Toyota, though the total mileage is < 150K

    Three questions:

    1) Does the diagnosis and suggested maintenance seem correct?
    2) Is the brake booster different from the brake actuator?
    3) I don't think it's worth it to pay $3200 given the value of the car, but is it still safe to drive? Is it just that the ABS won't work or am I putting myself in more danger?

    Thank you!!

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  2. tankyuong

    tankyuong Senior Member

    Joined:
    Nov 9, 2012
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    Location:
    Central MO
    Vehicle:
    2012 Prius c
    Model:
    II
    Check your 12v battery
     
  3. hog_washington

    hog_washington New Member

    Joined:
    Jul 28, 2021
    2
    0
    0
    Location:
    Texas
    Vehicle:
    2010 Prius
    Model:
    N/A
    The mechanic said they checked the 12v
     
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