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p2601 and humming noise

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by k1ngn0thing, Apr 24, 2022.

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  1. k1ngn0thing

    k1ngn0thing Member

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    2007 prius p2601 and humming noise - YouTube

    is this safe to drive? I did 80 miles in one day with no more than 20 minutes between stops with no apparent overheating so I'm hoping it's just the CHS pump and not integral to cooling.
     
    #1 k1ngn0thing, Apr 24, 2022
  2. PriusCamper

    PriusCamper Senior Member

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    Kinda sounds like air in inverter cooling system that needs to be bled out... And you got P2601 as a recurring error code, or just once?
     
    #2 PriusCamper, Apr 24, 2022
  3. k1ngn0thing

    k1ngn0thing Member

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    cleared it and it came back after 50 miles. about this time last year I did replace the inverter pump, but I was under the impression this code wasn't for the inverter cooling system.
     
    #3 k1ngn0thing, Apr 25, 2022
  4. PriusCamper

    PriusCamper Senior Member

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    Yeah, the code isn't, but the sound kinda sounds like there's still some air in the system from when the inverter was replace. So sound and code might not be related. And if it's just the CHS pump, it just slightly lowers MPG when engine is cold, so easy to live with. Least expensive fix is getting one at a junk yard and pulling it yourself so you have a good sense of what it will take to install it.
     
    #4 PriusCamper, Apr 25, 2022
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