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Several Intermittent warning messages

Discussion in 'Gen 4 Prius Technical Discussion' started by Mark Donat, Sep 24, 2023.

  1. Mark Donat

    Mark Donat New Member

    Joined:
    Sep 24, 2023
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    Location:
    Clearfield UT
    Vehicle:
    2017 Prius
    Model:
    Two Eco
    My 2017 Prius Two Eco has an intermittent problem where multiple warning messages and lights will come on. The warning messages change. The messages are related to ABS, braking, radar cruise control, lane departure warning, etc. There seems to be a correlation between cold weather and moisture, as the problem occurs more often in cold and wet conditions. Roughly 70% of the time it does not show any warning messages. The obd2 port is not pulling any codes. I just bought the car. The Hood will not close all the way which is a clue that it has had some kind of front end damage but no accident on the Carfax.
    Thank you in advance for any insight you may have.
     
    #1 Mark Donat, Sep 24, 2023
  2. Drakxyfly

    Drakxyfly Junior Member

    Joined:
    Sep 18, 2023
    112
    24
    0
    Location:
    Usa
    Vehicle:
    2021 Prius
    Model:
    LE
    Check the accessories battery
     
    #2 Drakxyfly, Sep 30, 2023
  3. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
    1,485
    803
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    Location:
    SacTown, Ca
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    If no insurance claim, police report, or reputable large chain repair shop has touched the car - nothing will show up on Carfax. That's why it's so important to take a used car to a trusted mechanic for an evaluation. That's money well spent, if you know nothing about cars.
    Issues with the ABS system/wiring will cause a cascade failure of radar/cruise control. Those are disabled because the ECU can't properly see or brake the car. Someone probably turned off functions to extinguish the CEL, so they can sell the car to an unsuspecting buyer. I've even seen black electrical tape over the CEL, behind the odometer glass. Bottom line - buyer beware...

    Hope this helps.

    PS. Have the car scanned with Toyota certified OBDII scanner.
     
    #3 BiomedO1, Sep 30, 2023
  4. sam spade 2

    sam spade 2 Senior Member

    Joined:
    Mar 31, 2018
    7,035
    2,790
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    Location:
    USA
    Vehicle:
    2017 Prius c
    Model:
    Four
    Meaning the smaller 12 V one.
    And it's main cable connections.
     
    #4 sam spade 2, Sep 30, 2023
  5. Drakxyfly

    Drakxyfly Junior Member

    Joined:
    Sep 18, 2023
    112
    24
    0
    Location:
    Usa
    Vehicle:
    2021 Prius
    Model:
    LE
    Yes if it's never been changed it's a 6 year old battery. Wouldn't hurt to also get Dr Prius app and test the hybrid battery as well
     
    #5 Drakxyfly, Sep 30, 2023
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