P0A80 and P3015 with cooling fan coming on.

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Michael Bones, Mar 12, 2019.

  1. Michael Bones

    Michael Bones New Member

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    I'm not sure how to do that when the car is sitting in my driveway and it's the only car I have. Do you mean that I need to take the aux 12v out of the car and take it to someone who can test it under a load like Pep Boys? I paid $200.00 for it about 2yrs ago.

    LOL Jerry!
     
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  2. jerrymildred

    jerrymildred Senior Member

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    12.7 volts resting is fine. 14.5 or 14.7 in ready mode is perfect. Ignore the comment about the car reducing the charge voltage when it's fully charged. You can load test the 12V with a headlight bulb, some wires, and your multi-meter or Pep Boys can test it, but it's next to impossible for those voltages to cause a bogus P0A80 code. Especially when the car is also telling you which block has failed.
     
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  3. Michael Bones

    Michael Bones New Member

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    That is what I was thinking Jerry. I have been in the automotive business for 35 years but this Hybrid stuff is a whole different world. I have read that the HV ECU sometimes can get sketchy and this battery has been in and out of the car about 3 times so I was thinking that maybe a faulty connection might be somewhere. I would think though that if lets say the connection on block 5 was sketchy then the resistance values would be higher.
     
  4. jerrymildred

    jerrymildred Senior Member

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    Before buying anything, it's a good idea to check the wiring harness on the traction battery. The sensing wires can get corroded and those bad connections can trick the ECU into thinking there is high resistance and/or low voltage on a block. And '07 could be a candidate for a bad battery OR a bad connection.
     
  5. bisco

    bisco cookie crumbler

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    I was responding to post #18

    It may be time for you to start reading the hv battery testing and repair threads
     
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  6. Avi's Advanced Automotive

    Avi's Advanced Automotive Independent hybrid repair shop

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