Code c1256,1241. Intermittent actuator failure.

Discussion in 'Gen 2 Prius Technical Discussion' started by oldsam, Jan 10, 2026 at 8:46 PM.

  1. oldsam

    oldsam New Member

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    Location:
    Missouri
    Vehicle:
    2004 Prius
    Model:
    II
    I have an 04 Prius that had a break actuator that was cycling every few seconds so I replaced it with a used one and bled it using tech stream and everything was fine. Now every few weeks or even months I will get the brake warning lights and high-pitched squeal. I can shut the car off and the problem goes away when I restart it, I replaced the 12 V battery. I have a few other codes, but I don’t think they are really related to it I enclose some freeze frame data. If someone could help me interpret it I would appreciate it IMG_4433.jpeg
     

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  2. oldsam

    oldsam New Member

    Joined:
    Yesterday
    2
    0
    0
    Location:
    Missouri
    Vehicle:
    2004 Prius
    Model:
    II
    Sorry about the spelling I used voice recognition