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A C compressor causing P0AA6 code

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Seymour1, Jul 19, 2024.

  1. ChapmanF

    ChapmanF Senior Member

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    *starts stopwatch*
     
  2. Seymour1

    Seymour1 Junior Member

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    I cannot find my thread. Did I do something wrong?
     
  3. Mendel Leisk

    Mendel Leisk Senior Member

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  4. ChapmanF

    ChapmanF Senior Member

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    Not that I've noticed...
     
  5. Seymour1

    Seymour1 Junior Member

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    An update:
    I kept wondering how can the high voltage cable, the fuse and the compressor all fail at the same time? So, I replaced the high voltage cable first, then test drove the car. (I noticed that the old cable had been cut by something-maybe it reached the fan blades.) There was no yellow triangle when I drove the car. Then, I plugged in the low voltage plug onto the compressor; no yellow triangle. Then, I installed the fuse and went for a ride; no yellow triangle. Finally, I turned on the A/C switch. Only warm air came out, and I could not hear the compressor running. The fuse did not blow. There is pressure in the system. I quickly opened the schrader valve to test it.
    My next step is to measure and/or add freon.
    I bought a new manifold set, but I used it to add R134A to my 2007 Corolla (non-hybrid). Then, I read a post that warned that if I used the same manifold set on my hybrid, I would contaminate the system with the wrong type of compressor oil. Is this true? If I flush the manifold set cables with acetone or 99% isopropyl alcohol, will that render them clean enough?
    Thanks in advance for assistance.
     
  6. ChapmanF

    ChapmanF Senior Member

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    Are there any trouble codes from the HVAC system now? Those are mostly B14xy codes.

    If you haven't got a scan tool that shows them, you can retrieve them without one; look for "Codes from the heat/air conditioning system" toward the end of this page:

    Blink (a/k/a Flash) Codes – How to. | PriusChat

    I don't know that I'd take a chance with a homebrew flushing solution, whether acetone, isopropanol, or what not.

    There are flush regimens that have been used on hybrids when the wrong oil got in (you can search threads here for HECAT), but I don't know if that's anything you could do to a manifold set, for less money than just buying another manifold set to keep dedicated for hybrids.