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Red Triangle + Check engine + ( (!) ) Brake system + Hybrid system on MDF and no code

Discussion in 'Gen 2 Prius Main Forum' started by PANN KETYA, Nov 15, 2018.

  1. PANN KETYA

    PANN KETYA Junior Member

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    I have a 2004 prius, while I was driving around 20kmph then on dashboard it show Red Triangle + Check engine + ( (!) ) Brake system + Hybrid system on MDF and Hybrid Fan starting to kick hard that I can clearly hear while listening to music. Also the acceleration is reduced and I pulled over and use my OBD2 Bluetooth to check the code and found P0128 which supposed to be Thermostat. After that I got a thermostat replaced and clean the code then the car driving normally for the last 2 days. Later on it show the same thing ( Red Triangle + Check engine + ( (!) ) Brake system + Hybrid system on MDF ) but this time there is no code found while all those symbols light up.

    What should caused the problem?

    *Note: Airbag lights fixed already.

    Thanks for sharing. 20181111_202531.jpeg 20181111_202536.jpeg 20181111_202549.jpeg

    Posted via the PriusChat mobile app.
     
    #1 PANN KETYA, Nov 15, 2018
  2. PriusCamper

    PriusCamper Senior Member

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    There's probably sub-codes that your code reader isn't seeing... the Dr. Prius app for your phone might be of use for that... You have to buy a bluetooth adapter: Hybrid battery diagnostic and repair tool for Toyota and Lexus The other option is the Toyota Techstream reader and computer software. Once you know the error codes this website will tell you how to fix. Also a quick easy fix is to disconnect 12v battery for 5 minutes and let the light and codes clear. They might come back, they might not. Also make sure you have a healthy 12v battery.
     
    #2 PriusCamper, Nov 15, 2018
  3. bisco

    bisco cookie crumbler

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    welcome!

    you probably need a new hybrid battery

    all the best!(y)
     
    #3 bisco, Nov 15, 2018
  4. PANN KETYA

    PANN KETYA Junior Member

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    Thanks for the reply.
    I have checked the high voltage battery and they all reading in respectable voltage.

    Thanks

    Posted via the PriusChat mobile app.
     
    #4 PANN KETYA, Nov 15, 2018
    bisco likes this.
  5. PANN KETYA

    PANN KETYA Junior Member

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    I can clear code thought Bluetooth OBD 2 Scanner and car works fine again. But come up again and again. 12v battery and HV battery also and still the problem. I did a lot of research with this and seems like my inverter pump is bad so I checked it and inside inverter coolant resevior, there's no turbulence or any wave at all then I touched the actual pump but it seems to works fine.

    But why isn't turbulence there?

    Thanks.

    Posted via the PriusChat mobile app.
     
    #5 PANN KETYA, Nov 15, 2018
  6. bisco

    bisco cookie crumbler

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    perhaps the pump is humming.vibrating, but not actually pumping
     
    #6 bisco, Nov 16, 2018
    05PreeUs, Skibob and PANN KETYA like this.
  7. PANN KETYA

    PANN KETYA Junior Member

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    Thanks. I tested, the pump is fine but don't know why there is no turbulence or wave.

    I use LAUNCH scan tool to find codes, and it shows that I have a problem with HV battery in block 6.

    I'm going to replace those two cells and let see if it trips the code again.

    Sorry for my English.
    Thanks for sharing.

    Posted via the PriusChat mobile app.
     
    #7 PANN KETYA, Nov 16, 2018
    PriusCamper and bisco like this.
  8. bisco

    bisco cookie crumbler

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    your english is fine, are you going to balance it?
     
    #8 bisco, Nov 16, 2018
  9. 05PreeUs

    05PreeUs Senior Member

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    Based on photos #1 and #3 in your original post, I'll bet the HV pack has a weak module or two.

    If the HV battery charge meter goes from: top > bottom > top in under say 5 miles of driving, it's in the HV pack.

    Additionally, the HSD cooling pump may be turning, that does NOT mean it is pumping. Debris can get into the system and damage the pump impeller, if that happens eventually the flow stops even if the pump runs.
     
    #9 05PreeUs, Nov 16, 2018
  10. PANN KETYA

    PANN KETYA Junior Member

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    i don't know how to balance them but i measure all cells include newer and then all giving from 7.4v to 7.8v.

    it seems fine for now. let see if another module fails after it.

    Thanks.
     
    #10 PANN KETYA, Nov 19, 2018
  11. PANN KETYA

    PANN KETYA Junior Member

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    Thanks for your information.
    I got mine fixed by replaced block 6 because of its weakness.
    now car runs fine. let see if other modules will failed after that.
    and i still keep an eyes on Inverter pump also.

    Thanks.
     
    #11 PANN KETYA, Nov 19, 2018
    05PreeUs likes this.
  12. Victorio Mo

    Victorio Mo Member

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    This is 100% bad Hybrid Battery, (* single or several module).
     
    #12 Victorio Mo, Mar 19, 2020
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