Dr. Prius Green vs Yellow bars

Discussion in 'Gen 2 Prius Main Forum' started by qmanqman, Oct 8, 2025 at 4:58 PM.

  1. qmanqman

    qmanqman Active Member

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    With Dr. Prius running while driving, I noticed that when I hit the brakes the bars turn yellow. If you google what yellow and red means, the Google AI tells you it's an indication of the battery's diminishing life.

    If you then Google "what does it mean tha the voltage bars on the dr prius ap turn from green to yellow when I brake" you get this:

    AI Overview

    When the voltage bars on the Dr. Prius app turn yellow while braking, it indicates the car is using the hybrid battery to regenerate energy, not the main 12V battery, and is a normal function. The change from green to yellow is expected because the system is in a different operating mode, converting kinetic energy from braking into electricity to charge the hybrid battery.
    • Normal operation: When you brake, the hybrid system uses regenerative braking. This process converts the energy from slowing the car into electricity to recharge the hybrid battery pack.
    • App interpretation: The app is showing that a different part of the hybrid system is now active. The color change on the voltage bars is simply the app's way of indicating that the high-voltage battery is being used to charge, rather than the car's conventional 12V battery, which is the source of the green bars.
    • What to expect: It's normal for the app to show different colors and readings depending on whether you are accelerating, cruising, or braking. A healthy system will have different bars lighting up or changing color as the car's power source shifts from the 12V battery to the hybrid battery and back again.
    I know that's a lot of words but what does this mean: "the car is using the hybrid battery to regenerate energy, not the main 12V battery?"

    1. How does the car use the hybrid battery to generate energy?
    2. When does the the car use the 12V battery?
    3. I thought the car used the brakes to generate energy and store it in the battery.
     
  2. Brian1954

    Brian1954 Senior Member

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    It means that Google AI got it wrong!
     
  3. qmanqman

    qmanqman Active Member

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    LOLLL . . . that's was my initial thought
     
  4. ChapmanF

    ChapmanF Senior Member

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    Yeah, the AI bot wrote in a very confident style while clearly not knowing what it was talking about.

    Which isn't a lot different from the occasional human poster on PriusChat. :D But it seems funnier and more innocent when an AI bot does it, since we kind of don't expect the bot to really know what it's talking about, anyway.
     
  5. highmilesgarage

    highmilesgarage Active Member

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    AI was feed with wrong information and this is it's greatest weakness, it's no surprise that it will be trained only to give one-sided information or information that you only like (such as a propaganda) Sometimes if you are not specific with what you say or type on the prompt (a partial question) it will just fish out some bad information which you need to figure out yourself (meta AI is worst)
     
  6. PriusCamper

    PriusCamper Senior Member

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    Google AI is wrong... The bars turning from Green to yellow and then to red is an indication of maximum amount of energy you can put into the battery on recharge and much more rarely on discharge. It's perfectly normal for the bars to turn yellow sometimes. And also ok for it to hit red for a second or two. If it stays red, then you have a problem. And if it goes into yellow often you might have a lack of capacity and a need for deep cycling to restore it, which I suspect is where Google AI is making that conclusion.

    But in general, Google AI is the worst... So entirely wrong so often... They could of been the leaders in AI a decade ago, but instead they decided that surveillance of Android and Chrome users to boost ads sales was the only thing Google was good for and they have been spending billions to catch up on the AI race and failing miserably ever since. Saddest part is, had they not got greedy and just focused on offering the best internet search services, they'd still be #1 but there's a special term of this type of corrupting influences (see below). We all need to stop using Google entirely! There's so many better more honest, factual and less decrepit services to use.
     
    #6 PriusCamper, Oct 9, 2025 at 3:05 PM
    Last edited: Oct 9, 2025 at 3:20 PM