My Prius Is Sick

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by SheldonJ2009, Jun 27, 2021.

  1. SheldonJ2009

    SheldonJ2009 New Member

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    Hi there I have the warning lights on my Green Prius 2009 standard! I know my tire sensor is bad I know it’s number ID4 I had since 2021 of March. I went on vacation for 2 weeks to Walt Disney World/Universal World In FL Then i had my dad pass away from a heart attack the day after I came back so it sat for another a week. It’s my first car I had since 2010. But what should I do my since all my lights are on and I have no power once I get on my the main road. I tried resting the codes but 15 seconds later it comes back on. I checked my 12v buts it’s at 12.45 Off And 14.55 On. I really don’t want to sell the Prius. So what are my options for a new or rebuilt hybrid battery? Let me know Sheldon R Jackson!
     

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  2. chronon

    chronon Active Member

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    the blocks look very close to throwing the red delta due to getting close to 1.2v dif.
    have u been into the pack ?
    corrosion sets in with any battery terminal after several years .. that preventive maintance will buy u time and it looks like the one offending block can be checked further, one of the modules in that block could have a bad cell. replacing that module will buy u time until the next lowest one gets too low, or u could replace the 2 lowest , hopefully just 1 offending module in each low block.
     
  3. rjparker

    rjparker Senior Member

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    If you want to keep the car, bite the bullet and get a new battery. One with new cells, not a rebuilt, refurb, Dorman or other used battery. If six months reliability is good enough and $2k for another ten years of reliabilty is not in the budget, then go used.

    Just remember the car in its current shape has almost no trade in or resale value so the amount of money to buy something else is substantial. Plus the used and new car markets are at an alltime high price point due to shortages.

    If you or a local mechanic are advanced diy, self installed new cells is an option from the link below. Otherwise shop all local dealers for a new battery.
    Prius Battery Replacement Kit (GenII/GenIII) with NEW custom cells | PriusChat

    Be careful, some online sources imply long warranties on refurb but don't follow through with quality. Finally, most guys on this forum would rather mix and match used cells three times a year rather than spend money to achieve long term reliability.
     
    #3 rjparker, Jun 27, 2021
    Last edited: Jun 27, 2021
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  4. SheldonJ2009

    SheldonJ2009 New Member

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    I never been in the hv battery pack but I do wonder why the current battery sensor and battery temp sensors went bad usually the cells go bad only the hv battery pack. I wouldn’t think the Prius is any shape to sold in. But I would like to keep the my Prius until it dies out. But I would need a cheap option to get my Prius back on the road. ASAP Since I don’t have my Prius to drive at the moment. I could use my Wife’s Martha 2012 C One Prius Until my Prius getS fix. She loves that Prius 2012 C One. We Used Her Prius C one 2012 to drive to FL.
     
  5. chronon

    chronon Active Member

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    actually, a company out of california has a drop in lithium replacement for under $2k .. i dont know about ' 10 yrs of reliabilty' i... if the car is already 15+ yrs old u aint gettin no 10 yrs of 'reliability' - u got Combo meter(capacitor failure of 100uf - requires dash removal (1hr+job) and either u have solder skills or u pay someone who already did the work $100+, MFD(requires dash removal(but not as much as combo meter, item can range used from $60 on up), and dont forget the ABS_/break pump - this item could be under $200 used but more $ with any warranty - and is one back breaker removing 1st time ... these things are gonna go if they havent already in the next 5 yrs , more than likely, i dont call that 'reliability ' when u cant read the speed your going or know how much fuel is in the tank, cant see the various things like temperature and so forth on the MFD , and of course the brakes goe without saying .... and God forbid, the invertor/convertor transmission failure which could occurr, is another one of the 'big 3' to go on prius.
     
    #5 chronon, Jun 27, 2021
    Last edited: Jun 28, 2021
  6. mr_guy_mann

    mr_guy_mann Senior Member

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    Well, from your codes and symptoms, you have multiple problems with the high voltage battery. The 2 temperature and current sensor codes point to likely corrosion damage at the battery ecu and harness. The "replace battery" code is probably caused by a failed module (a 1.2V difference is diagnostic of a bad module- could be corrosion but not likely).

    New from Toyota or Newpriusbatteries are the most reliable options (5-10 years) but also most $$$. Most any other option (refurb or used) might get you 6 months to maybe a couple years.

    Posted via the PriusChat mobile app.
     
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  7. GabrielD

    GabrielD Member

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    Sheldon,
    I think first and important thing is to be better informed.
    Here is my story, I think is very similar to yours...
     
  8. chronon

    chronon Active Member

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    Yes ! - and as i found, if u have corrosion, it was pointed out to pull the battery-ECU harness and check those pins and take apart the Battery ECU .. and wouldnt u know a charred pin is found at the pins and some of that corrosion/charring can extend down onto the ECU board. (pictures of this i have taken and are in a thread on this very topic under 'gen 2 maintanence')
    Fixing modules (replacing) is one thing, bus bar terminal cleaning is another and last is the ECU Vsense harness and the ECU /connection itself (the most difficult and sensitive task- the Vsense connections to the bus bars are thin, with corrosion they are thinner - they get compressed onto the bus bar with a nut and washer (hopefully) - great care in removal of Vsense to bus bars must occurr or they can tear ).
    Great care around the very difficult area of the ECU connections is needed. ECU should be removed to make this task easier (since the ECU cover should be removed for PCB inspection anyway!) - a delicate and well controlled hands are needed with ECU / pin harness dealing.

    As u can tell, i went through a special torture on my 2nd gen prius and was happy to see it go last week after it sat since 1 wk of May. Prior to that it sat for a year or so from 2017-2018? - sitting hybrids are the death of them. The guy that picked it up seemed very competant and capable and even brought a modern laptop fully functional techstream for the checkout.. it was impressive.
    Years earlier, I had a gen 1 prius and went through a more extended battery charging attempted hell with the heavier traction battery. Had a small bumper fender/bender while doing 'Lyft' .. had the bottom half repainted ... a few smaller incidents to body afterwards .. Then there was the 2 times the windshield had to be replaced due to heavy cracks from squirells dropping pine cones from 20 feet up.

    I still have a Camry hybrid that , sat , and has several modules needing to be addressed (more battery hell to contend with).
     
    #8 chronon, Jun 28, 2021
    Last edited: Jun 28, 2021
  9. bisco

    bisco cookie crumbler

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    how many miles on her?
     
  10. chronon

    chronon Active Member

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    one of the pics has the combo meter , showing the odo .. which reads 225k
     
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