Hybrid battery warning light on after replacing 12v battery

Discussion in 'Generation 1 Prius Discussion' started by SteamRollerCC, Feb 8, 2019.

  1. SteamRollerCC

    SteamRollerCC Junior Member

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    Hello,

    My car wouldn't start yesterday due to the 12v battery giving out after more than 7 years. So, I went to the Toyota Dealer for a replacement. They assured they sold me the correct battery, and when I went to replace it, the car turned on... but after about 5-10 seconds, the hybrid warning light (with the triangle red light) came on and the engine shut down, but is still drivable using the hybrid battery.

    Does anyone know what could've gone wrong? Thanks in advance!
     
  2. 2k1Toaster

    2k1Toaster Brand New Prius Batteries

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    When the 12v battery is low, all sorts of weird things happen. Replace the battery, clear the codes, and carry on.
     
  3. Brian in Tucson

    Brian in Tucson Active Member

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    He did replace the battery. Unless it's defective it shouldn't be the cause of his problems. Steam, you might want to check the voltage of the aux battery with a voltmeter and charge it up as needed. If there's still a problem, take the battery back to Toyota to be checked out and maybe exchanged.

    Replacing the battery will clear the codes at least temporarily. Don't try to drive the car without the I/C motor.
     
  4. Mendel Leisk

    Mendel Leisk Sidewalk Supervisor

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    Outa gas??
     
  5. George W

    George W Active Member

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    Did the dealer sell you a discharged battery? By the way, the car will not 'charge' a low-condition 12V battery, it really only trickle-charges it, maintaining it. If your dealer sold you a battery without topping it off, you need to take it to any of the auto-parts places that can do it for free.
     
  6. Mendel Leisk

    Mendel Leisk Sidewalk Supervisor

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    Or get a smart charger.
     
  7. 2k1Toaster

    2k1Toaster Brand New Prius Batteries

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    I read the OP's sentence as "when I started my drive to the dealership to replace the bad battery all these bad codes came on."

    If it is "I bought a new battery from the dealership, installed it, and on first power up after installation all these bad codes came on" then yeah that's different.

    I wish people would be more descriptive when they have an issue...
     
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  8. ChapmanF

    ChapmanF Senior Member

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    Doesn't sound like anybody's even read any codes yet.

    Finding out why the car thinks those lights should be on would at least be sort of interesting.
     
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  9. jerrymildred

    jerrymildred Senior Member

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    Drivable in theory. But you'll destroy your traction battery if the engine isn't running to keep it charged.

    Better to have it towed to the dealer and have them read the codes and fix it unless you have the tools and diy skills to do it at home.

    Without reading the codes, it's a million to one that anyone will guess the problem.
     
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  10. Brian in Tucson

    Brian in Tucson Active Member

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    I wish that when new members sign up for 'Chat' they would take the time to fill in the "location" box. Mostly I suspect that noobs have no idea what info would be helpful on Prius Chat.
     
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  11. Brian in Tucson

    Brian in Tucson Active Member

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    Damm right Mildred.
     
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  12. greasemonkey007

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    I've had a few 1st gens that were pretty fussy after disconnecting the 12V. I had to clear the codes a few times and finally it got itself reoriented.
     
  13. primuspaul

    primuspaul Member

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    Codes stuck in the system from something going wrong during install. Need to clear codes and see if car will start and run, then continue until further troubles occur.
     
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