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Battery(s) warning

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Bob Holliston, Nov 9, 2020.

  1. Bob Holliston

    Bob Holliston Junior Member

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    A couple days ago I got in my 2007 Prius and the small battery was dead for no good reason. I charged it and all was good two days. I just got in the car, put in drive and got the death triangle along with the msg" Shift to park, the battery's won't charge if in neutral" which it wasn't. No msg. in reverse but with it in D or B. Any ideas? BTW, about 6 mo. ago I pulled the big battery and replaced a bad cell. Thanks, Bob.
     
  2. JC91006

    JC91006 Senior Member

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    sounds like you should replace the 12v if it's testing bad again (most likely)
     
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  3. sam spade 2

    sam spade 2 Senior Member

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    The "good reason" likely is that the 12 V battery is worn out.
     
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  4. cyberpriusII

    cyberpriusII Prodigyplace says I'm Super Kris

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    Like SS2 said.
     
  5. Bob Holliston

    Bob Holliston Junior Member

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    I thought I posted yesterday, but couldn't find it. I'll try again. 3days ago the battery was dead in my 2007 for no good reason. I charged it and all was good for a day. Last night I started it, and the triangle of death came on with a flashing msg: "the battery will not charge with the car in gear, shift to park". Put in in park the msg goes away (which doesn't get me to the grocery store), In D or B it starts up again, but not in R. I don't feel comfortable backing up where ever I go. Any ideas? Thanks, Bob.
     
  6. PriusCamper

    PriusCamper Senior Member

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  7. mr_guy_mann

    mr_guy_mann Senior Member

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    +1 for 12V battery. Replace or have it charged and load tested. A bad or weak 12V on a Prius will cause all kinds of havoc. It doesn't mean that you don't have any other problems BUT you need to be sure that it is good before you can evaluate anything else on the car.

    Posted via the PriusChat mobile app.
     
  8. sam spade 2

    sam spade 2 Senior Member

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    This makes positively NO SENSE.
    Post #1 in this very thread is almost identical to this one.
    If you found this thread, how is is possible that you could NOT find the first post ?????????????
    Answers have been given.
    But maybe you "can't find" them either.:whistle:
     
  9. strawbrad

    strawbrad http://minnesotahybridbatteries.com

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    Before you replace the 12 volt battery check out this thread. It might fit what is happening with your car.

    P Lock C2310 Fix Fixed Solved Solution | PriusChat
     
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  10. strawbrad

    strawbrad http://minnesotahybridbatteries.com

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    Is this the warning you are seeing? That's just Toyota speak for "shut the door dummy, your car is in drive". It lights up with the drivers door open in D and B but not P, N, or R.

    door open.jpg
     
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  11. sam spade 2

    sam spade 2 Senior Member

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    No harm in reading through that BUT......
    Given that he has had trouble with the battery recently, doing ANYTHING else before at least testing it would not be wise.
     
  12. vvillovv

    vvillovv Senior Member

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    A youtube shows how to get into Prius Maintenance Mode. There should be a 12 volt battery screen somewhere in maintenance mode that will give clues to 12 volt health and other diagnostics.

    This video shows have to get in on both gen2 and 3