Prius HV Battery Dr.prius

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by 123omari123, Jul 31, 2025 at 8:26 AM.

  1. 123omari123

    123omari123 Junior Member

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    Can anyone tell me in short is this stats normal or does my HV Battery have any problem?
    First screenshot > engine is not turned on. Second and third screenshot > Engine turned on and then A/C, headlights turned on:
     

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    #1 123omari123, Jul 31, 2025 at 8:26 AM
  2. Tombukt2

    Tombukt2 Senior Member

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    So with the AC and headlights turned on you're just sitting there in the parking lot the engine running AC on heads don't really matter. And I'm assuming you're in the red or the pink? On MFD?
     
    #2 Tombukt2, Jul 31, 2025 at 10:50 AM
  3. bisco

    bisco cookie crumbler

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    normal
     
    #3 bisco, Jul 31, 2025 at 2:07 PM
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  4. Brian1954

    Brian1954 Senior Member

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    I am curious why you are asking. Do you get any warning lights on the dash?

    The third Dr Prius screenshot with the AC turned on shows a voltage difference of 0.41 volts when the hybrid battery is discharging at 12 amps. That is a sign of a hybrid battery that could have problems. The trouble code P0A80 will be activated when the voltage difference between battery blocks is greater than 0.30 volts for a certain period of time. Toyota does not say how long that time peroid is.

    What year is your, Prius, and how many miles?
     
    #4 Brian1954, Jul 31, 2025 at 5:17 PM
  5. 123omari123

    123omari123 Junior Member

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    I didn't understand what do you mean?


    Because I think my HV battery discharging fast during driving, and in the city it often shows 30 mpg. I think resistance is very high, am I write or not? especially on 5fth module. Can you tell me what are these three temperatures?
     
    #5 123omari123, Jul 31, 2025 at 6:06 PM
  6. Brian1954

    Brian1954 Senior Member

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    28 milli-ohms on the 5th battery block is not a concern for me. I would be concerned when the battery block resistances gets to 30 milli-ohms and higher.

    There are three battery temperature sensors located along the battery pack. Sensor #1 is located closest to the end of the battery where the cooling air is forced into the battery for cooling. Sensor #2 is located at the center of the battery pack. Sensor #3 is located near the end of the battery farthest from where the cooling air is forced into the battery. The battery temperatures shown in the screenshots look fine to me.

    To get a better idea of the health of the hybrid battery, you need to be driving the car and look at the Dr Prius data when you are using maximum acceleration. The discharging current of the battery will increase to 50 to 80 amps. Then, look at the voltage difference value to see how high it gets.

    The other way is to pay the Dr Prius fee and run the Life Expentancy Test.

    What year is your Prius, and how many miles?
     
    #6 Brian1954, Jul 31, 2025 at 8:05 PM
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  7. Grit

    Grit Senior Member

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    The 3 snap shots looks normal and are not conclusive evidence of battery life. It would be like showing 3 still images of a heart sonar sonar view. You want to actually see the video capture of the heart beating for a minute under various stress levels
     
    #7 Grit, Aug 1, 2025 at 12:51 AM
    Last edited: Aug 1, 2025 at 1:07 AM
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  8. Carall

    Carall Member

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    You need to restore the capacity in your battery before it's too late, if the mileage is not too high.
    You're from Georgia, you should understand russian.
    This video shows how to do it, in this part (part 1) and in the second part (part 2).
     
    #8 Carall, Aug 1, 2025 at 1:04 AM
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  9. 123omari123

    123omari123 Junior Member

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    2010 , 160k mile. What will be abnormal, if discharging current will be more than 80 amps during driving? and what will be normal voltage difference at this time too?



    Yes I'm from Georgia but I know english better :) , Thanks for info, I will show others who knows Russian.
     
    #9 123omari123, Aug 1, 2025 at 4:42 AM
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