2005 prius, how far can you go on a dying hybrid battery

Discussion in 'Gen 2 Prius Technical Discussion' started by Friendofpriusowner, Nov 16, 2021.

  1. Friendofpriusowner

    Friendofpriusowner New Member

    Joined:
    Nov 16, 2021
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    Location:
    Portland Or. USA
    Vehicle:
    2005 Prius
    Model:
    II
    My friend is broke and her hybrid battery was going out since she bought it a little over a year ago. (She got it for 5grand at 30% I tryed to reason with her)
    She just got finished replacing the stolen catalytic converter for the second time,
    And a week after, her car just stopped working, would not go into gear except for neutral.

    I got my OBD2 tool and I got three codes
    Poa80 po0037 poa7a

    My guess is her battery so far gone that it can no longer start the generator or whatever Priuses have that starts the engine,

    What are you guys think?
     
  2. nancytheprius

    nancytheprius Member

    Joined:
    Oct 25, 2020
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    Location:
    iowa
    Vehicle:
    2006 Prius
    Model:
    II
    Are you handy enough to locate the bad cells and replace them? Takes a lot of time and diligence, buts theres tons of information out there on it. That could buy her some more time to save up for a new battery. I am assuming she wouldnt want to sell the car, because she has only had it for a little while

    i think you can disconnect the 12 v battery for a short while to bypass those codes when you reconnect, but that would be very short term
     
    #2 nancytheprius, Nov 17, 2021
    Last edited by a moderator: Nov 17, 2021
  3. nancytheprius

    nancytheprius Member

    Joined:
    Oct 25, 2020
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    Location:
    iowa
    Vehicle:
    2006 Prius
    Model:
    II
    This person is willing to trade their working cells for your friends dying cells it looks like! Could be the perfect swap for your friend to get by!
     
  4. Ds001001

    Ds001001 Junior Member

    Joined:
    Mar 6, 2016
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    Location:
    Tahoe North Lake
    Vehicle:
    2007 Prius
    Model:
    N/A
    I live in Tahoe now, I haven’t updated my profile. I have two target dealers to buy from, one near LA and one near San Francisco if I swap battery so not sure that would be convenient for someone in Portland. Im like 75% for battery swap currently. If all of the stated repairs go well and all of the noises and codes are gone is when I’ll make decision to to battery swap.
     
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  5. SFO

    SFO Senior Member

    Joined:
    Feb 7, 2017
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    Location:
    Northern California
    Vehicle:
    2007 Prius
    Model:
    N/A
    Welcome to PriusChat!!
    Have you had a chance to look up any of the retrieved OBD2 codes (DTCs) ??

    Here is the workup for DTC P0037 : https://share.qclt.com/%E4%B8%B0%E7%94%B0%E6%99%AE%E7%91%9E%E6%96%AF%E5%8E%9F%E5%8E%82%E8%8B%B1%E6%96%87%E6%89%8B%E5%86%8Cpdf%E6%A0%BC%E5%BC%8F/repair%20manual/04pruisr/05/2054m/cip0037.pdf (was the sensor replaced with an OEM or Denso?)

    Below are the nine workups for DTC P0A7A, notice how each one has a 3 digit subcode (aka INF or detailed code), knowing the subcode may help in diagnosing or fixing the problem without wasting excess time or money. Many here use a mini-vci cable and techstream (dealer technician diagnostic software) installed on a winblows device (can emulate) to retrieve the subcodes.

    DTC P0A7A/309 Generator Inverter Performance
    DTC P0A7A/321, 323 Generator Inverter Performance
    DTC P0A7A/322 Generator Inverter Performance
    DTC P0A7A/324 Generator Inverter Performance
    DTC P0A7A/325, 517, 518 Generator Inverter Performance
    DTC P0A7A/342, 343, 519 Generator Inverter Performance
    DTC P0A7A/344 Generator Inverter Performance
    DTC P0A7A/520 Generator Inverter Performance
    DTC P0A7A/522 Generator Inverter Gate Malfunction

    Given the situation, and location, you might reach out to @PriusCamper - not super close, but he does make it down the I-5 at times.

    FYI : you're moderated until you've posted 5 times.
     
  6. Prii Newbe

    Prii Newbe Junior Member

    Joined:
    Oct 23, 2019
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    Location:
    San joaquin
    Vehicle:
    2006 Prius
    Model:
    Base
    I only got 2 days (100mi) after the triangle of death. Using Torque app i could see the 14 module voltages and yup, #2 was low. I would drive most of the way on side roads to avoid steep hills, and occasionally reset the codes at a stop light. I did manage a limp home mode on day 2 going to work. Freaked me out since the RPM's went to around 3500, and letting off the gas, the car kept going! Finding a parking lot i pulled in, shut it down, waited a few minutes, started it up and did a reset. Didn't go back into limp mode for the rest of the trip. Before all that, the car sat for over 2 weeks waiting for State Farm to see daylight to get my cat replaced...

    The key is driving it so the pack isn't being hit hard, very soft accelerations...avoid hills if at all possible. Monitoring the pack and being able to reset the codes helps stay out of limp home mode.

    On a previous pack rebuild, the earliest indication of a problem is rapid swings on the bargraph (like empty to near full in a mile traveled)...another indicator is the car keeps idling at a light while playing with pack charge/discharge cycles... the triangle is primed to ignite since the cell voltages are getting further apart..
     
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