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Lots of Warning Lights - Dead Battery? - Please Help!

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by nberna19, Jan 16, 2017.

  1. nberna19

    nberna19 New Member

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    Hi All,

    I have a 2007 Prius w/ 90k miles and left town for 6 weeks while weather had been very frigid and sub freezing quite often. When I returned home to fire up my Prius the dash lit up like a Christmas tree with numerous warning lights:

    -Big red triangle Master Warning Light
    -Hybrid System Warning Light
    -Slip Indicator Light
    -VSC light
    -ABS light
    -Check Engine Light
    -Brake System Warning Light
    -Transmission P-Lock Mechanism Error on the MFD

    Now I can't even start the car. Before I left town none of these lights had previously appeared and the the car was in fine working order. I pulled up the battery diagnostics on the MFD and it read 10.9 while powered on without foot on brake and then dropped to 9.9 when power button was hit again. Looks like I'll need to replace the 12V battery (right?) and hopefully not have to get it towed. Hopefully most these other warning lights are flukes. Any insight would be greatly appreciated. Thanks!
     
    #1 nberna19, Jan 16, 2017
  2. Andyprius1

    Andyprius1 Senior Member

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    Charge 12 V, get a jump start from somebody. Reboot with power button several times, If necessary. If you have a trickle charger, leave it charging all night. Should you get a ready light then run the engine and charge the battery for 15-30 minutes. Should none of this work, take a lead off the 12v and leave it off for 10 seconds, then resecure, tighten connections good. This reininitiates all the computers in the car.

    May have to get a new 12V Battery.

    What does your 12 V battery read ? ( need a voltmeter, or multimeter)

    Does the car sit outside ?

    Never leave a hybrid for six weeks without FIRST Maxing out charge on 12 V and Hybrid battery especially outside in Winter. Then: after charging both, disconnect 12V, just one lead. Then depart for 6 weeks.
     
    #2 Andyprius1, Jan 16, 2017
    Last edited by a moderator: Jan 17, 2017
  3. nberna19

    nberna19 New Member

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    Yes it sat outside in cold conditions. Probably a mistake. Hindsight 20/20 I guess
     
    #4 nberna19, Jan 16, 2017
  4. bisco

    bisco cookie crumbler

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    nberna, why have you posted the same thing twice?(n)
     
    #5 bisco, Jan 16, 2017
  5. Andyprius1

    Andyprius1 Senior Member

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    I missed it the first time.
     
    #5 Andyprius1, Jan 16, 2017
  6. bisco

    bisco cookie crumbler

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    you're not the only one.
     
    #6 bisco, Jan 16, 2017
  7. dolj

    dolj Senior Member

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    #7 dolj, Jan 16, 2017
  8. edthefox5

    edthefox5 Senior Member

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    you
     
    #8 edthefox5, Jan 16, 2017
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  9. edthefox5

    edthefox5 Senior Member

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    need
     
    #9 edthefox5, Jan 16, 2017
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  10. edthefox5

    edthefox5 Senior Member

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    a new
     
    #10 edthefox5, Jan 16, 2017
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  11. edthefox5

    edthefox5 Senior Member

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    battery
     
    #11 edthefox5, Jan 16, 2017
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  12. nberna19

    nberna19 New Member

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    @edthefox5 thank you very much. Point well taken
     
    #12 nberna19, Jan 17, 2017
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  13. bisco

    bisco cookie crumbler

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    LOL, good humor, good sport.(y)
     
    #13 bisco, Jan 17, 2017
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  14. Andyprius1

    Andyprius1 Senior Member

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    See my post on Battery's Plus Store on post: Any 12 V mechanics in the area.
     
    #14 Andyprius1, Jan 17, 2017
  15. Andyprius1

    Andyprius1 Senior Member

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    Glad to see your still with PRiuschat, Ed
     
    #15 Andyprius1, Jan 17, 2017
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