Going to buy a 2005 with a dead hybrid battery

Discussion in 'Gen 2 Prius Main Forum' started by Bunce, Jan 5, 2018.

  1. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    12,259
    4,766
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2005 Prius
    Model:
    II
    Maybe you can sell this car for $2000 after you fix the battery. Then buy another prius you can depend on
     
    Prodigyplace and Raytheeagle like this.
  2. 2k1Toaster

    2k1Toaster Brand New Prius Batteries

    Joined:
    Feb 14, 2010
    5,175
    2,589
    0
    Location:
    Rocky Mountains
    Vehicle:
    2006 Prius
    Model:
    Three
    Sounds like it's not just the battery. If the interior and such is in good condition and you have the time and patience, parting it out would be profitable. Prius parts aint cheap.
     
  3. VFerdman

    VFerdman Active Member

    Joined:
    Jul 5, 2017
    407
    410
    0
    Location:
    Western Massachusetts
    Vehicle:
    2007 Prius
    Model:
    Three
    I concur with the 12V battery replacement. I had seemingly unrelated codes come up when my 12V was weak. If you go after codes you will be chasing your tail for a while. I had a repetitive P0446, which is evap system test failure. After I put a new 12V battery in over a month ago, no more code. Also Parking System warnings went away after a fresh 12V battery. Just going after codes is not a great way to tackle repairs. I would first get the thing running more or less properly, do the obvious things like engine and transaxle oil change, filters, 12V battery, etc. Then see what else is going on. This car does not sound like a keeper to me. Too many things to do. But that's me. Your situation is your own.

    Best of luck with it.

    P.S. After deciding to buy my very first Prius (also first hybrid and first Toyota) I looked for candidates for several months. Then The One came along. A single owner '07 with 175K miles and not a thing wrong with it. Well taken care of and loved. I paid $3,400 for it. I invested into Prolong system (to the tune of $700) and performed one reconditioning so far. The SOC on the battery is now always in blue and often in green. I love the car, but it was in an absolutely beautiful shape when I bought it. I looked at one '04 with bad battery for $1,500. Drove for almost 2 hours to see it. It also had a dent in the rear quarter (they are famous for that), bad shocks on the front, god only knows what else. It drove, but had a triangle. I left very quickly. Just do not like that much trouble. It had a fairly clean beige interior, too.
     
    edthefox5 likes this.
  4. Bunce

    Bunce Member

    Joined:
    Jan 5, 2018
    120
    47
    0
    Location:
    Oregon
    Vehicle:
    2005 Prius
    Model:
    II
    So I spent today taking the car apart, carrying the battery up 4 stories, then taking the battery apart, a bit of swapping, a lot of cleaning copper, putting the battery back together, installing and I just got back from a test drive.
    The driveability is much improved. However I still have some codes, as expected as they're separate issues, I think.
    P0303 - that would be the misfire in Cyl. 3, I plan on checking the plugs and running some Marvel Mystery oil in the tank, and possibly a little piston soak. While I'm in there I'm going to put a new PCV in.
    P1121 - I'll be replacing the coolant control valve next.
    P0A80 - Now I thought this was a HV battery code, but can it also arise from other powertrain issues such as the P1121?
     
  5. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    12,259
    4,766
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2005 Prius
    Model:
    II
    Disconnect the 12v battery and all the codes will reset. See what codes come back

    P0a80 is not related to anything other than hv battery
     
  6. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    929
    1,160
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    N/A
    Did you have the 12v disconnected when you were working on the HV battery or did you leave it connected so you'd be able to operate the doors and hatch? If you left it connected, I can understand why. Its a pain not being able to open the hatch from the outside when you need to. If so, I definitely agree with JC9. If you're not able to reset the codes via the OBD port, disconnect the 12v negative cable for a few minutes.
     
  7. Bunce

    Bunce Member

    Joined:
    Jan 5, 2018
    120
    47
    0
    Location:
    Oregon
    Vehicle:
    2005 Prius
    Model:
    II
    I forgot to mention, I pulled the 12v battery to give it a good charge and just re-installed it.
    I tried clearing codes and they came back right away.
    Well that's bad news, I wonder what it could be.

    Here's the readings I got after pulling into my parking spot with headlights still on.

    Block V
    1 - 16.8
    2 - 16.8
    3 - 16.7
    4 - 16.7
    5 - 16.7
    6 - 16.7
    7 - 16.8
    8 - 16.6 (this was the trouble block)
    9 - 16.8
    10 - 16.8
    11 - 16.8
    12 - 16.7
    13 - 16.7
    14 - 16.8

    @63% SOC
    Aux Batt @ 14v
     
  8. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    929
    1,160
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    N/A
    Bunce, what instrument are you using for reading codes?
     
  9. Bunce

    Bunce Member

    Joined:
    Jan 5, 2018
    120
    47
    0
    Location:
    Oregon
    Vehicle:
    2005 Prius
    Model:
    II
    Torque Pro
     
  10. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    929
    1,160
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    N/A
    I don't have that one on my apps. I should probably download it. Does it offer additional data for subcodes of the P0A80? (hmm. does p0a80 have subcodes..my brain is fried today..) no, no info codes for p0a80. Does it offer freeze frame data?
     
    #90 TMR-JWAP, Jan 12, 2018
    Last edited: Jan 12, 2018
  11. Bunce

    Bunce Member

    Joined:
    Jan 5, 2018
    120
    47
    0
    Location:
    Oregon
    Vehicle:
    2005 Prius
    Model:
    II
    It does graphing apparently. I only ever used it to read and delete codes so I'm learning here.
     
  12. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    929
    1,160
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    N/A
    If you're able to get graphs of the block voltages while driving, that would be a great help. We'd be able to see how each block reacts to a decent current load.

    Another simple app is Hybrid Assistant and Hybrid Reporter, The HA app has an option at the bottom to do a battery check. If you select that button, and then drive a bit, it will log all the HV battery info, which will save itself when you exit the app. Then run hybrid reporter. It will show you the saved file, select it and then the app will provide all the graphs. You'll just need to scroll down to the battery health graphs where it will show all 14 blocks voltage graphs from the entire drive.
     
    SFO likes this.
  13. Bunce

    Bunce Member

    Joined:
    Jan 5, 2018
    120
    47
    0
    Location:
    Oregon
    Vehicle:
    2005 Prius
    Model:
    II
    I saw in some threads you did that, what did you use?
    I think I can only graph 1 "sensor" at a time so I dont think Torque will work.
    Does Hybrid reporter do that?
     
  14. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    929
    1,160
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    N/A
    Bunce,

    Here's a screen capture of a graph provided by HR. This was done just by warming up the car so the engine would stay off, start the HA app, then run the AC on full blast, then pressing the battery test. I ran it to discharge the battery from about 80% down to 45%, then stopped it and saved it. Open HR app and select the file and it will graph it. You can clearly see each module's voltage curve. Stronger blocks hold their voltage better. Weaker blocks will be lower on the graph since they lose their voltage faster.

    If you do the test while driving, the graph will have a lot of ups and downs, as the battery will discharge and charge, but you'll still be able to see the strength of each module relative to each other

    You can also do a load test as recommended on the HA app website, which uses a method of placing the car in 'reverse', holding down the brake and giving it throttle to load the battery while the HA app records data. That works also.

    Of course, a P0A80 can also be due to the HV battery ecu, not just blocks/modules, but most frequently, it is the block voltages

    Battery A Dec 11 load test capture a.png
     
    #94 TMR-JWAP, Jan 12, 2018
    Last edited: Jan 12, 2018
    gamma742 likes this.
  15. Bunce

    Bunce Member

    Joined:
    Jan 5, 2018
    120
    47
    0
    Location:
    Oregon
    Vehicle:
    2005 Prius
    Model:
    II
    Well I tried going to get this report and something has happened between when I parked it and just now. It would not go into gear, it would click when changing from P to N but would not go into to D or R.
    The ABS and traction lights are also now on, along with the triangle the exclamation mark and the CEL.
    I tried disconneting the +ive for a minute with no change. When I clear the code the car beeps at me instantly and the triangle is back.
    Also of note, there's a liquidy sort of noise but like it's inside something, maybe the coolant pump? I don't know, and there's some other fan or pump than runs when it's on.
    Also when I put my foot on the brake, for a few seconds it sounds like an abs system is activated, that sort of pulse sound.

    Due to the above it didn't have any data for the HV battery health.

    At this point I think I need to figure out why the bugger won't start, so then I can get data. Any ideas?
     
  16. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    12,259
    4,766
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2005 Prius
    Model:
    II
    Your 12v battery is probably low. Check to make sure it's over 12v
     
  17. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    929
    1,160
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    N/A
    What code is it showing now?
     
  18. Bunce

    Bunce Member

    Joined:
    Jan 5, 2018
    120
    47
    0
    Location:
    Oregon
    Vehicle:
    2005 Prius
    Model:
    II
    Weirdly once I cleared them it wasn't reading any new codes, even though the dash was lit up.
     
  19. Bunce

    Bunce Member

    Joined:
    Jan 5, 2018
    120
    47
    0
    Location:
    Oregon
    Vehicle:
    2005 Prius
    Model:
    II
    I'll put a jump pack on it in the morning and see what happens.
    Odd though as I just put it through a few charge cycles with my AGM charger over the last few days.

    Checking my screenshot the aux battery was reading 12.0 v. It was 12.8 when I put it in the car this afternoon and I only drove perhaps 20 miles.
    What does the 12v power?
     
  20. TMR-JWAP

    TMR-JWAP Senior Member

    Joined:
    Aug 12, 2016
    929
    1,160
    0
    Location:
    Columbia, SC
    Vehicle:
    2007 Prius
    Model:
    N/A
    If you disconnect the 12v, you should have to press the 'power/start' button twice. After reconnecting the 12v, put foot on brake, press the power button, wait a few seconds (dash will still be lit up) then press power button again. All alarms should clear and car should be ready to use.

    If you do that procedure, what happens?
     
Loading...