Pre-collision error following by many others(C1425 P0572 C164E B2284)

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by sorka, Feb 3, 2025.

  1. sorka

    sorka Active Member

    Joined:
    May 9, 2008
    1,017
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    0
    Location:
    Merced, CA
    Vehicle:
    2019 Prius
    Model:
    Limited
    Tonight, our 2019 Prius started displaying a PKSB Pre-collision Malfunction error. I scanned the codes which were C1A4B and C1A50. I went for a drive and confirmed the front camera still worked because LDW was still functioning and auto brights also worked.

    Then about an hour later, these additional errors popped up:
    Anilock brake malfunction
    Reduced braking power
    Lane departure warning malfunction

    I scanned again with the following additional codes:

    C1425
    P0572
    C164E
    B2284

    They all came back within a few seconds of clearing them.

    I disconnected the battery for a few hours which made no difference.

    The battery is fairly new measuring 12.8 volts more than an hour after the inverter was turned off.

    The brakes feel like they have normal power although I know antilock brakes won't work.

    Is there a commonality to these errors that could explain them all?
     
  2. sorka

    sorka Active Member

    Joined:
    May 9, 2008
    1,017
    197
    0
    Location:
    Merced, CA
    Vehicle:
    2019 Prius
    Model:
    Limited
    This morning all the warnings disappeared and everything seems to be working but the engine check light remained on. The remaining codes:

    P0572
    C1425
    B2284

    are all brake related. I was able to clear them and the engine check light went out and the codes haven't returned.

    In retrospect, I think I screwed up. If this is an intermittent problem, I have no proof that it already happened and the warranty is going to expire in 3K miles. So ironically, I hope it comes back soon because I think it's going to come back eventually no matter what.