2007 Prius: Red Triangle + ABS + Engine Check lights :(

Discussion in 'Gen 2 Prius Main Forum' started by Lindsay Mathieson, Nov 22, 2025 at 6:45 AM.

  1. Lindsay Mathieson

    Lindsay Mathieson Junior Member

    Joined:
    Dec 4, 2023
    26
    10
    0
    Location:
    Brisbane, Australia
    Vehicle:
    2007 Prius
    Model:
    N/A
    While driving - close to home fortunately, made it back.

    Have run Toyota Techstream to pull the codes, got the following:

    Hybrid Control:
    • P0A08
    • P3102
    • B2799
    ABS/VSC/TRC
    • C1241
    Air Conditioner :)
    • B1421
    • B1476
    Gateway:
    • B1210
    Quite the list :(

    From my somewhat naive searching, I'm wondering if its the 12 volt battery that's the problem? Is it worthwhile just replacing it as a start before panicking? Same battery from when I purchased the car in 2023

    175k KM on the clock.
     
    #1 Lindsay Mathieson, Nov 22, 2025 at 6:45 AM
  2. Brian1954

    Brian1954 Senior Member

    Joined:
    Jan 31, 2021
    2,140
    828
    0
    Location:
    South Central PA, USA
    Vehicle:
    2011 Prius
    Model:
    III
    If you have a volt meter, use it to measure the 12v battery. Check at the battery terminals and at the jump point under the hood with the car off. Also, check when the car is Ready (on).
     
    #2 Brian1954, Nov 22, 2025 at 9:11 AM
  3. priumium

    priumium Member

    Joined:
    Sep 8, 2024
    103
    25
    0
    Location:
    Sweden
    Vehicle:
    2012 Prius Plug-in
    Model:
    Four
    All questions should by default be answered with:

    As a person who do not wish to pay for fault codes (since posting here) to any mechanic without any knowledge of the actual issue; get a Bluetooth 4 OBD2 dongle, such as vlink or similar, read the codes from your phone.

    Note to all; This tip may be outside the scope of what Toyota recommends…
     
    #3 priumium, Nov 22, 2025 at 9:40 AM
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