1. Attachments are working again! Check out this thread for more details and to report any other bugs.

state of charge problem

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by depeters, Dec 30, 2011.

  1. depeters

    depeters New Member

    Joined:
    Dec 12, 2009
    8
    0
    0
    Location:
    parkersburg, WV
    Vehicle:
    2009 Prius
    Model:
    N/A
    My 09 prius, 28,000 mi., recently began showing all green on the highway for hours at a time without ever going blue. In town, it is green 3/4 of the time. New 12 v battery did not help.

    Dealer checked it out & found codes B1200, B1207, & B1271. He re-set the "gateway"ECU & cleared codes.

    Leaving the dealer, all was well & traction battery level performed just as it did when new. Halfway home, the meter jumped from blue to all green again & remains there.

    What should I expect my dealer to do for a permanent solution. Still under warranty plus the platinum extended warranty.
     
    #1 depeters, Dec 30, 2011
  2. efusco

    efusco Moderator Emeritus
    Staff Member

    Joined:
    Nov 26, 2003
    19,891
    1,191
    9
    Location:
    Nixa, MO
    Vehicle:
    2004 Prius
    Model:
    N/A
    No swings to the pink/purple levels with this? Are you running the climate control pretty aggressively?

    In winter the ICE tends to run more to maintain the cabin heat and then 'spills' the extra energy produced into the battery which forces it to a higher SOC level.

    I would suggest a little experimenting. Turn off the climate control (max cold rather than totally off if you want to avoid fogged windows-AC off/auto-off/just low fan speed and max cold setting), then do some low speed driving about maximizing gliding and electric only driving (after the ICE has warmed up completely) and see if that doesn't bring the SOC down.

    Also, be sure you're not driving in B-mode (I realize that's probably silly, but it happens).
     
    #2 efusco, Dec 30, 2011
  3. ursle

    ursle Gas miser

    Joined:
    Jun 28, 2006
    1,049
    192
    0
    Location:
    NH
    Vehicle:
    2011 Prius
    Model:
    Four
    A quick perusal of google says, ;)guess,(I kid because it's always the 12v)

    12v battery is dyeing, get an optima.
    Weird things happen when the 12v is dying, do a search here on the forum, it's the one thing that needs to be changed in every prii, even before the first tire change.
     
    #3 ursle, Dec 30, 2011
    1 person likes this.
  4. depeters

    depeters New Member

    Joined:
    Dec 12, 2009
    8
    0
    0
    Location:
    parkersburg, WV
    Vehicle:
    2009 Prius
    Model:
    N/A
    anyone have identification on those codes?
     
    #4 depeters, Dec 30, 2011
  5. cwerdna

    cwerdna Senior Member

    Joined:
    Sep 4, 2005
    12,544
    2,123
    1
    Location:
    SF Bay Area, CA
    Vehicle:
    2006 Prius
    #5 cwerdna, Dec 30, 2011
  6. edthefox5

    edthefox5 Senior Member

    Joined:
    Jul 25, 2007
    10,096
    4,795
    0
    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    Op says a new 12 volt did not help.
     
    #6 edthefox5, Dec 30, 2011
  7. edthefox5

    edthefox5 Senior Member

    Joined:
    Jul 25, 2007
    10,096
    4,795
    0
    Location:
    Clearwater, Florida
    Vehicle:
    2007 Prius
    Model:
    Two
    Sounds like the Battery Control Module may have failed. Seen those before here.
     
    #7 edthefox5, Dec 30, 2011
  8. depeters

    depeters New Member

    Joined:
    Dec 12, 2009
    8
    0
    0
    Location:
    parkersburg, WV
    Vehicle:
    2009 Prius
    Model:
    N/A
    that's the direction I was leaning since re-setting didn't work for long.
    Now to convince them to just get it done & stop messing around.
     
    #8 depeters, Dec 31, 2011
  9. richard schumacher

    richard schumacher shortbus driver

    Joined:
    Mar 27, 2004
    7,663
    1,038
    0
    Location:
    United States
    Vehicle:
    2004 Prius
    Model:
    N/A
    Ditto that. According to Bentley those three codes point to wire harness or ECU faults. I don't know why a dealer would resist doing some warranty (that is, paid by Toyota) work.
     
    #9 richard schumacher, Dec 31, 2011
  10. josh2008

    josh2008 Active Member

    Joined:
    Sep 2, 2008
    365
    144
    0
    Location:
    Princeton, WV
    Vehicle:
    2004 Prius
    Model:
    N/A
    Good luck sinces there's no hv batt dtcs. Our 05 has signs of weak hv battery and i couldn't get Toyota corporate to let me do anything about it because there were no dtcs. The best part was I worked for Toyota then..... now were only 4k away from being outside warranty coverage. I'm sure ill have to foot the bill when it fails.
     
    #10 josh2008, Dec 31, 2011
  11. andyprius

    andyprius Senior Member

    Joined:
    Feb 21, 2005
    2,212
    188
    0
    Location:
    Sacramento, California.
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Try, building up a case by visiting them once a week, or sooner with the exact same complaint so at least it will be documented and then you can go to Toyota Corp if the HV actually fails. Is that worth $2500-$4000 ? I think so. :cheer2: PS Visit different dealers and keep records.
     
    #11 andyprius, Dec 31, 2011
  12. andyprius

    andyprius Senior Member

    Joined:
    Feb 21, 2005
    2,212
    188
    0
    Location:
    Sacramento, California.
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    Normally that would be an ideal situation, a constant green battery! As Evan suggested, that is the time to go stealth, or run on battery alone, or max out the AC, to your comfort range. It just might be that you have a super efficient Prius! What is your average MPG ?:D
     
    #12 andyprius, Dec 31, 2011
  13. josh2008

    josh2008 Active Member

    Joined:
    Sep 2, 2008
    365
    144
    0
    Location:
    Princeton, WV
    Vehicle:
    2004 Prius
    Model:
    N/A
    I was a service tech for Toyota then, trust me, I did everything i could.
     
    #13 josh2008, Dec 31, 2011
  14. depeters

    depeters New Member

    Joined:
    Dec 12, 2009
    8
    0
    0
    Location:
    parkersburg, WV
    Vehicle:
    2009 Prius
    Model:
    N/A
    mpg at first dropped to 42 but rebounded to 47-48 after the new 12 volt was installed.
     
    #14 depeters, Jan 2, 2012
(You must log in or sign up to post here.)