I need a new hybrid battery

Discussion in 'Gen 2 Prius Main Forum' started by Has Raf, May 27, 2025.

  1. Has Raf

    Has Raf Member

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    So this happened this morning, all these dash lights. Used my Autel and got a P0A80 code, replace hybrid battery. No other codes. Have not been having issues with the hybrid battery at all! It’s even been fully green at times on the hybrid infotainment screen. Should I get a new hybrid battery from Toyota, or independent specialist? It’s going to Toyota on Saturday for some suspension issues anyway. There is a local independent specialist near me. I’m in the UK.
    246BD6B9-7D10-4A54-A79A-DFD38E64AA24.jpeg 625638D9-1276-4739-B0D8-9B62442DDFB9.jpeg
     
  2. bisco

    bisco cookie crumbler

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    idk the options you have there. new oem is best, but expensive. if you intend to eep the car, it is worth it.
    here, there are myriad rebuilders, some better than others but all a crapshoot for longevity.
    salvage is another option, but can you trust age and miles, and how long it's been sitting?
     
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  3. Has Raf

    Has Raf Member

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    Update: Spoke to my local Toyota. They asked re the 12V battery, and if it has been replaced recently, which it has, by them. They said this can cause the error code to be thrown up. I’ve cleared the code, no symptoms or limp mode etc. Can the 12V being changed cause a replace-hybrid-battery-code?
     
  4. bisco

    bisco cookie crumbler

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    No, only a weak 12v can cause unintended error codes sometimes.
    It should be load tested, even though new.
    If it is good, you should have the codes checked with tech stream, that will give you more detailed information on the hybrid battery cells
     
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  5. highmilesgarage

    highmilesgarage Active Member

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    expect that red triangle to go back anytime soon, when that happened to me it took several days to show up and then it becomes frequent. 12v issues can cause a lot of codes other than p0a80 (like codes for car modules "under voltage")
     
  6. Brian1954

    Brian1954 Senior Member

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    The P0A80 code will probably return within the next week or so.
     
  7. Has Raf

    Has Raf Member

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    So I should get Toyota to check the health of the hybrid battery? because I’d want them to replace it if it does need replacing.
     
  8. Brian1954

    Brian1954 Senior Member

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    Yes, have the dealer check the hybrid battery.
     
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  9. Has Raf

    Has Raf Member

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    P0A80 code has returned.
     
  10. T1 Terry

    T1 Terry Active Member

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    Are you the sort of person who can do fairly easy hands on repairs to your car? There are a lot of threads on here and a lot of You Tube videos about accessing the traction battery. There is a good chance the problem is corroded terminals and sense wires that just need cleaning and painting with an anti corrosive paste like Alminox.

    If you aren't the type to attempt your own repair, then I'd say go with the Toyota dealer, it won't be cheap, but it will be the better option.

    T1 Terry
     
  11. Has Raf

    Has Raf Member

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    I can DIY. Do you have a video of this said repair?
     
  12. jdenenberg

    jdenenberg EE Professor

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    Has,

    Just be careful as the 200v battery can kill so wear electrical insulated gloves. Once you have disconnected the bus bars (for cleaning) the battery is safe as each module only has 7.2 volts.

    JeffD
     
  13. T1 Terry

    T1 Terry Active Member

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    Once you pull the main fuse, the battery is broken up into one larger and one smaller battery that would require quite a feat of flexibility to get connected between the negative and the positive.
    But, it never hurts to be careful, so be sensible and wear insulated gloves to both protect you electrically, and from possible chemical burns from the corrosion build up.
    This will get you to the battery and how to take it out.

    and here is one on pulling it apart

    but you will find heaps of them on You Tube and threads on here about testing and cleaning etc on the Gen 2 battery

    T1 Terry
     
  14. Has Raf

    Has Raf Member

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    Toyota said the car also needs front lower control arms, an offside driveshaft, hybrid battery (1 cell is the culprit, not the whole battery). Toyota never checked the health of the hybrid battery. They said they couldn’t check the health with an EML on… I’ve decided it’s not financially economical to repair, and am selling the car instead.
     
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  15. pasadena_commut

    pasadena_commut Senior Member

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    Really? Remember they are called "stealerships" for a reason.

    Both lower control arms are bad, not some associated bushings that attach to them? I can believe that a rubber bushing might have rotted out but lower control arms usually last forever unless they are in a salty environment or the car has been in a wreck.

    CV axles do go bad, usually after a boot tears and contaminants get in and ruin a bearing. Is it making noise? Does it have a torn boot? I have not had a problem with them yet on our Prius but would probably have them rebuilt with Toyota parts, especially the boots. Our Accord just had an aftermarket CV axle replaced after only 5000 miles and not quite 3 years because something tore a hole in the outside boot and it was flinging grease all over the place. My impression is that the boots on the aftermarket axles are not nearly as tough as the OEM ones were, leading to early failure. On the other hand, the aftermarket ones are much cheaper, assuming the manufacturer even still makes the axle, which they don't for our Accord. On that Accord if a person was willing to change the axle themself the part is only around $50 from RockAuto. What makes it expensive is paying somebody else to do it, which I did in this case. That resulted in the part being marked up to $120 and labor was $180.
     
  16. bisco

    bisco cookie crumbler

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    sounds like a good plan. it is different if you can diy these things
     
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  17. Has Raf

    Has Raf Member

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    Some things I’m confident in DIY-ing, but not what needs doing at the moment. Even if I bought the parts myself, and got my independent to fit them, I’m confident it’s not financially economical. If want the hybrid battery from Toyota too. And who’s to say nothing else will need replacing soon after this? I’ve replaced 2 wheel bearings, both front struts and springs, a wheel hub knuckle, aux belt, ABS sensor, fitted a lift kit, replaced wipers and 12V battery, had a 100k service done and MOT (£845 as work needed doing to pass) all since buying the car a year ago… I think I’m done now. I’ll buy petrol Jazz.
     
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  18. pasadena_commut

    pasadena_commut Senior Member

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    How many kilometers on this vehicle? The first picture in this thread shows the odometer at 43251 (presumably km), but that seems impossibly low for a 2nd generation Prius this many years later. The car has a lot of front end issues, as problems listed include: both lower control arms, a CV axle, struts and springs, a wheel hub (front?), wheel bearings (front?), abs sensor (front?). For comparison, our 2007 had one front wheel bearing replaced a couple of years ago and it is at 227000 km, with none of those other issues. Was the OP's in a wreck or driven into a ditch?

    There is no "aux belt" on this car. The one belt on the motor is dedicated to driving the water pump, at least on the US model. Belts get worn, or just old, on any car that has them. On our 1998 Accord we just changed the timing belt, water pump, and all the external belts. Not because they were obviously worn, but because they were all 10 years old.
     
  19. bisco

    bisco cookie crumbler

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    predicting future automobile repairs is a difficult proposition. more of a seat o the pants decision.
    and with hybrids, it gets even more murky