1. MikeCelvMC

    MikeCelvMC New Member

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    2 Days ago while driving around my prius was acting whenever i was at a stop it would turn off and turn on alot more often that usual. After coming to a stop after driving slowly through a parking lot there was a loud beep and the master warning light, check engine light, brake system light (!), and VSC light came on aswell as the Red car with exclamation mark on multi-function display. I took it home immediately while the car was very slow to accelerate. At home i used an OBD scanner and got a P08A0 code. I thought maybe something was wrong with the 12v battery so i unplugged it and plugged it backin and the car drove fine i drove it about 50 miles the next day no problems. Today i was driving through a pharmacy drive through and the same lights came back on with the sluggish acceleration. I came home and used an obd scanner to clear the codes and after turning the car off and turning it back on the lights immediatly come back on. The battery level on the display was 2 bars purple. I cleared the codes again turned the car off and on and the battery level was all the way back up and green i drove down my neighborhood road with no problem. I got home turned the car off and when i turned it back on the battery was back down and all the lights were back on. Does anyone have an explanation for this? I bought the car a month ago the battery was reconditioned 2 years ago with the dealer telling the previous owners it would last 5 years.
     
  2. dolj

    dolj Senior Member

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    P08A0 is a code that says your HV (hybrid vehicle) battery is not happy.

    Clearing the codes (via a code reader or disconnecting the 12 V battery) does not fix anything, only give the car amnesia until the conditions for setting the code present again.

    If you can get by without A/C you could turn that off and drive very gently you might be able to get a few weeks/months more out of it, but you will only be delaying the inevitable.

    It is highly likely the reconditioned battery needs to be reconditioned again. Reconditioning/rebuilding is just a temporary measure to get you by. If the car is in pristine condition and nothing else is mechanically wrong with it, you could install a new HV battery and get another 10+ years from it. At 200,000 miles, it might be time to trade it in for something newer.
     
    #2 dolj, Aug 1, 2020
    Last edited: Aug 1, 2020
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  3. Leadfoot J. McCoalroller

    Leadfoot J. McCoalroller Senior Member

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    ^ Pretty much that. Reconditioning does help but it isn't magic. If it really has been done already, it probably won't be as effective on following attempts and eventually isn't worth the effort. Keep that in mind as you weigh out your future options.

    Hate to say it but it sounds like the previous owner gave you an incorrect impression of the battery's remaining lifetime.
     
  4. MikeCelvMC

    MikeCelvMC New Member

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    Today my OBD reader pulled a P3021 and a P08A0
     
  5. bisco

    bisco cookie crumbler

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    reconditioned battery = failure possible at any time. if there is a warranty, have them repair it. if not, not.
     
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  6. MikeCelvMC

    MikeCelvMC New Member

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    My main question is why was i able to drive 50 miles after i cleared the codes a day later with no problems but couldnt drive 2 miles the next day
     
  7. PriusCamper

    PriusCamper Senior Member

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    If you tell us what part of the US you live in the people on here who live near you may be able to help you directly? That error code is the general code for battery problems, but it's the sub codes that tell you what kind of problem...

    If you go to a Toyota Stealership, they'll look at you with $ signs in their eyes and immediately claim you have to replace everything for up to $5K and then say the car is barely worth that much and then they'll try to swindle you into an upside down loan for a new car.

    But if you come to one of us we will study the subcodes and if you're lucky, we'll be able to replace a $50 part that could solve all the problems.

    Or if you're DIY oriented you could buy a mini VCI dongle that comes with Toyota Techstream software that runs on old Windows computers, or more easy is buying a OBD2 bluetooth reader and using Dr. Prius app to diagnose sub-codes and monitor all the battery's vital signs. Here's buyers guide for OBD2 reader: Hybrid battery diagnostic and repair tool for Toyota and Lexus
     
  8. dolj

    dolj Senior Member

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    Clearing the codes gives the car amnesia. Sometimes it takes 50 miles for the conditions that trigger a code to reappear. Other times the conditions a more severe and the code reappears straight away. P0A80 is a less severe code that sets to give a bit of advanced warning that things are getting out of tolerance in the battery, but you can reset it and go for some variable time until it resets. P0A80 + P3021 is more serious and it unlikely resetting will give you any time. You now need to do a module swap out to buy you some time, or if you want to do a reliable fix, you need to replace the battery with a new set of modules. The dealer can supply a new battery and if you are DIY inclined can save the cost of labor ($400 - $600) and provided you don't also need a new battery ECU (burnt out connector pins), you should be able to procure a new battery for $1950 - $2,200 + taxes + a refundable core charge. If you are not DIY and can't find someone in your local area who can do the work for you, you can let the dealer take care of it. This all assumes the car is in otherwise pristine condition and is worth putting the money into.
     
  9. MikeCelvMC

    MikeCelvMC New Member

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    Coming back to this thread late but the 9nly thing wrong was 1 battery cell after replacing it im im ting amazing milage going from about a 38mpg average to a 45mpg average after replacement
     
  10. edthefox5

    edthefox5 Senior Member

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    Yes we call that a whack a mole battery repair. You will be right back in that box soon I'm afraid. Was it Craigs List?

    How many miles on the car?
     
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