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maintenance mode with a dead hybrid battery

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by StevilW, Dec 14, 2023.

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  1. StevilW

    StevilW Junior Member

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    Hi , my 2012 Prius hybrid battery stopped working about 1yr ago so I've been running the car without it for about 100k miles .
    Recently I replaced the Water Pumps plastic rotor which solved my overheating issues.
    Howevera month later I'm losing coolant from the reservoir and the coolant warning light is coming on .
    I can't find where it's leaking , code says it could be the coolant temperature sensor getting a low current.
    I'm going to compression test fearing cylinder issues and need to put car in maintenance mode apparently.
    Is that possible with hybrid system not working ?
    Also the hybrid system randomly came back to life for a couple of days, after I jump started the car from the fuse box terminal . Any thoughts ?
     
    #1 StevilW, Dec 14, 2023
  2. ASRDogman

    ASRDogman Senior Member

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    Your fuel mileage must suck! And driving is slow.

    And you likely have a blown head gasket. Pull the plugs and look inside the holes.
    I'd bet that #'s 1 nd 2 pistons are cleaner than 3 & 4.

    The hybrid battery must get and keep enough charge to turn the engine over.
    Maybe check the inverter, and for any loose connections since I "assume", you mean
    it charges the battery correctly?
     
    #2 ASRDogman, Dec 14, 2023
  3. Tombukt2

    Tombukt2 Senior Member

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    Wow that sounds really cool man. Sounds like you driving real slow and going nowhere I guess you bike to work or something or what have you. I guess you don't know anything about the two Z Atkinson cycle engine that's in your vehicle or what have you It's probably shocked basically I guess this is one of those plug-in things or something? Sounds disastrous.
     
    #3 Tombukt2, Dec 14, 2023
  4. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    Something not adding up in that statement.

    Also, could be your hybrid battery is deteriorating, but if it was indeed kaput I don’t the car would even start.

    What’s the miles on the odometer?
     
    #4 Mendel Leisk, Dec 14, 2023
    BiomedO1 likes this.
  5. bisco

    bisco cookie crumbler

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    Is this chat ai?
     
    #5 bisco, Dec 14, 2023
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  6. BiomedO1

    BiomedO1 Senior Member

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    I don't see how the ICE can start with a dead traction battery, much less drive 100K+ mile. Every time you stop at an intersection and the ICE shuts down; I don't see how it can restart itself.
     
    #6 BiomedO1, Dec 14, 2023
  7. bisco

    bisco cookie crumbler

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    Yeah, something wrong with the Algorithm
     
    #7 bisco, Dec 14, 2023
  8. ASRDogman

    ASRDogman Senior Member

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    If the computer thinks they battery is low and needs charging, it will keep running.
    Kinda hard to believe it's been driven 100,000 miles like that though....

     
    #8 ASRDogman, Dec 14, 2023
  9. Mendel Leisk

    Mendel Leisk EGR Fanatic

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    And in a year?
     
    #9 Mendel Leisk, Dec 14, 2023
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