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Car Shut Off / No Start - CEL Codes UO293 / B2799

Discussion in 'Gen 2 Prius Technical Discussion' started by PriuSocal, Mar 11, 2024.

  1. PriuSocal

    PriuSocal Junior Member

    Joined:
    Mar 23, 2023
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    Location:
    SoCal
    Vehicle:
    2008 Prius
    Model:
    N/A
    Well no ripples, no sound or vibration at the pump itself. I saw a few videos on youtube that show those ripples at the reservoir but a slight “aquarium pump” humm at the pump. Either way, neither present in the replacement pump. Just ordered a new one and should arrive tomorrow. I hope it works as im getting concerned now if anything could have messed up inside the inverter but the only thing that gives me hope is that car starts and drives, AM2 fuse is ok and no dash lights or codes present.

    Will post findings once I instal the new one.
     
    #21 PriuSocal, Mar 13, 2024
    Last edited: Mar 13, 2024
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
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    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    If you drive in weather that is too warm and the inverter can't get cool enough it'll start throttling back it's output to the battery to the air conditioner to the 12 volt etc It has intelligence enough to do that I drove around in the fall and part of winter in NC USA. With no problems and no throttling back driving on the highway and State roads here in North Carolina for about 5 months in the seasons specified with no issues at all car drove impeccably other than the facts that the broken inverter pump was unplugged hadn't even been removed yet was blowing the a.m. to fuse and would not work at all It was something internal wrong with the pump midwinter or early spring I got around to changing the pump literally left the bracket in the car just change the pancake clamped up the two hoses added some coolant plug the thing in working continue driving the car and it still on the road today running well pretty much impeccably not a light on anywhere pump runs fine. Even when I did this a few times in the summer time I never got it to throttle back but I didn't want to push it It seemed to do fine.
     
  3. PriuSocal

    PriuSocal Junior Member

    Joined:
    Mar 23, 2023
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    Location:
    SoCal
    Vehicle:
    2008 Prius
    Model:
    N/A
    Update:

    New pump came in today, installed it and immediately started humming and circulating the coolant. Previous pump was no good and this should be good as fixed I hope. I am going to test drive the car today in hopes that the issue does not return.
     
    dolj and Brian1954 like this.
  4. PriuSocal

    PriuSocal Junior Member

    Joined:
    Mar 23, 2023
    80
    21
    0
    Location:
    SoCal
    Vehicle:
    2008 Prius
    Model:
    N/A
    75 miles in and all is good. Thanks all for your input!
     
    Brian1954 likes this.