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2005 with 300k+ miles with the following codes P1122, P0a93, P0420, P0456

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Hopeful Prius repair, Sep 14, 2024 at 4:43 PM.

  1. Hopeful Prius repair

    Hopeful Prius repair New Member

    Joined:
    Apr 13, 2024
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    Location:
    Amarillo, tx
    Vehicle:
    2007 Prius
    Model:
    N/A
    My wife just got home and red triangle is on. I read the codes with a WiFi code reader and have what feels like a lot, and things I’ve replaced before.
    I’ve replaced both the inverter coolant pump, and the 3 way coolant pump before. I’ve questioned air bubbles but I’m not certain if it’s that or if I should replace most if not all of the coolant system since I’ve replaced parts of it in the past.

    any ideas or suggests oh where to start would be greatly appreciated. Otherwise I’ll listen for bubbles in the inverter coolant reservoir


    P0420
    Catalyst System Efficiency Below Threshold

    P0456
    Evaporative Emission System Leak Detected (very small leak)

    P1122
    Manufacturer Defined

    P0A93
    Manufacturer Defined
     
    #1 Hopeful Prius repair, Sep 14, 2024 at 4:43 PM
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