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P0A93 Low fluid level

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Boaztheostrich, Oct 28, 2024.

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  1. Boaztheostrich

    Boaztheostrich Junior Member

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    Hey all,

    Had a weird one recently.

    I got the P0A93 about an hr from my house and drove it back no problem.

    The initial checks I did was looking at the fluid and trying to listen for the hum although it was too loud next to the road to hear anything. It didn’t look like the fluid was moving or if any very little.

    Once I got it home I did some research and based on this thread: and some others ordered a new pump from autozone.

    But, I was looking at it today and it looks like the fluid level may have just been low. I topped it off, cleared the code, ran ac at max for awhile, and drove it around but haven’t seen the error again yet.

    I can hear it humming and there is some turbulence in the reservoir. Not a ton but it is definitely moving.

    I think I’ll still replace it with this autozone part I picked up as preventative maintenance but thought it was weird. I wouldn’t think that the fluid being an inch below the low line would cause an error like that.

    have any of y’all had a similar experience with the inverter pump / this code?

    Both fans are spinning, the radiator isn’t blocked, the radiator has enough fluid.
     
    #1 Boaztheostrich, Oct 28, 2024
  2. TMR-JWAP

    TMR-JWAP Senior Member

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    I have seen these inverter cooling water pumps function intermittently.
    As for the AutoZone replacement.......I highly recommend buying oem from Toyota. A bit of personal shopping has shown quite a large difference in pricing between local dealers. If you bought the dorman replacement, from my experience, you'd be better off buying a $30 Chinese counterfeit from Amazon. At least then you know what you're getting for that price.
     
    #2 TMR-JWAP, Oct 28, 2024
  3. Boaztheostrich

    Boaztheostrich Junior Member

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    Gotcha, I didn’t know Dorman was that bad. I have to drive about 2 hours out of town today so I was hoping for a quick fix.

    If it can last me a few years I may have to be ok with that for now but I’ll look if my local Toyota may have one.
     
    #3 Boaztheostrich, Oct 28, 2024
  4. mr_guy_mann

    mr_guy_mann Senior Member

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    Maybe good, maybe bad, nobody knows.

    There have been various reports on the forums where someone buys an aftermarket pump (for a "great" price).

    Then at some point the pump decides to not pump at all. Could be weeks, or months after installation. Cycle the power off and on and then it works again - until next time.

    I replaced the pump in mine with a Toyota part and expect that it will be good for 100k.

    Posted via the PriusChat mobile app.
     
    #4 mr_guy_mann, Oct 28, 2024
  5. Boaztheostrich

    Boaztheostrich Junior Member

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    Makes sense, imma see about borrowing a car for a few days so I can get the OEM part but I may just have to play the 3rd party game and hope it lasts.
     
    #5 Boaztheostrich, Oct 28, 2024
  6. pasadena_commut

    pasadena_commut Senior Member

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    When the Dorman runs it is a fine pump. The problem with mine was that it would every once and a while and for no obvious reason decide not to start when the car did. PITA problem. On some random day I would start the car, drive it a bit, and it would throw the red triangle. Pull over, turn off. Get out the OBD2 reader, find P0A93, turn the car back on, the pump would be working. Eventually took the pump back out of the car and tested it with a 12V source over and over, and found the intermittent start issue. Replaced it with an OEM pump straight from a dealer and no problems since.
     
    #6 pasadena_commut, Oct 28, 2024
  7. Boaztheostrich

    Boaztheostrich Junior Member

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    makes sense, I forgot to mention earlier, but I do have access to a parts car, a 2007.

    I was able to get the pump off of that and I’m hoping it will last me at least till the OEM part gets here.
    seems to be working great so far!

    Thanks for all the help!
     
    #7 Boaztheostrich, Oct 28, 2024
    Brian1954 likes this.
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