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Low power new battery

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Ca713, May 11, 2017.

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  1. Ca713

    Ca713 New Member

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    A couple months ago I was constantly getting "put vehicle on a flat surface and put in park" error message, along with red triangle warning light, hybrid warning light, hybrid battery light, check engine, and brake system warning light. Acceleration was pretty much nonexistent. Running it in diagnostic mode showed a charge of 11 and some volts. Diagnostic codes p0300 p0301 p0302 and hybrid code for battery (dont remember what code was) all came up. Got a new battery, took for test drive, all lights were gone and acceleration was back to normal. Next day error message about flat surface was back along with all the same dash lights minus battery light. Acceleration had also returned to being crappy. Changed out spark plugs and ignition coils, and topped off oil. Now acceleration is mildly better but not great. Just did another diagnostic mode check and battery when off is at 11.4, when turned on it is at 13.9. Also engine coolant fan is blowing really loud. Not sure if misfires still happening, I will need to have my friend with the tool check it next few days. Any advice is much appreciated.
     
    #1 Ca713, May 11, 2017
  2. edthefox5

    edthefox5 Senior Member

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    Bad hybrid battery.
     
    #2 edthefox5, May 11, 2017
  3. Ca713

    Ca713 New Member

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    Because of the charge level? I just want to understand so I know what I'm talking about when I call the battery place, it's still under their warranty.
     
    #3 Ca713, May 11, 2017
  4. dolj

    dolj Senior Member

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    No, more the symptoms you mentioned in your other thread.

    Unfortunately, (with the info here and in your other thread) the engine misfire codes will be due to bottom end damage caused by running the oil low.
     
    #4 dolj, May 12, 2017
  5. andrewclaus

    andrewclaus Active Member

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    I didn't see where you mentioned the charge of the hybrid battery. You mentioned the voltage for the 12V battery, which sounds too low at 11.4 volts. That should be over 12.0.

    Presumably the fan you're hearing is the hybrid battery cooling fan, not the engine fan. That alone points to a failing hybrid battery.
     
    #5 andrewclaus, May 12, 2017
  6. bisco

    bisco cookie crumbler

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    perhaps the new 12v wasn't properly charged when installed, and gave it up after a day. it should be fully charged up, around 13 volts, then see how it does.
     
    #6 bisco, May 12, 2017
  7. Ca713

    Ca713 New Member

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    Should have said the battery that was replaced was a refurbished hybrid battery and they are coming out tomorrow morning. Thanks
     
    #7 Ca713, May 12, 2017
  8. bisco

    bisco cookie crumbler

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    so, you are testing the voltage of the 12 volt battery, but you replaced the hybrid battery?
     
    #8 bisco, May 12, 2017
  9. dolj

    dolj Senior Member

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    I also meant to mention that your 12 V battery, with a voltage under 12 V, is flat. A fully charged AGM in good condition should be 12.9-13.2 V. While waiting for your HV battery service, you should put the 12 V on charge, using a modern automatic battery charger that has an AGM setting, for at least 12-16 hours, or until the charger says that charging is complete. Then test the voltage again after the charger has been removed for 2 hours or more. If the charge is less than 12.4 V your battery is not in great shape. If the voltage is ~12.7 it is reasonably ok. If it is less than 12.1 V, you should replace the 12 V battery.
     
    #9 dolj, May 12, 2017
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  10. Ca713

    Ca713 New Member

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    Yeah turned out it was none of these things. So .. Thanks?? Haha this forum sucks
     
    #10 Ca713, May 21, 2017
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  11. bisco

    bisco cookie crumbler

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    pleasure.
     
    #11 bisco, May 21, 2017
  12. andrewclaus

    andrewclaus Active Member

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    #12 andrewclaus, May 21, 2017
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  13. ericbecky

    ericbecky Hybrid Battery Hero

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    Inquiring minds want to know.

    What was the problem and the solution?

    I'm always interested in learning.
     
    #13 ericbecky, May 22, 2017
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