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P0A9C - Sensor "A" Location

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by TwoPriusInTenn, Jun 19, 2022.

  1. TwoPriusInTenn

    TwoPriusInTenn Member

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    P0A9C Sensor "A" Range/Performance - 2008 Prius, 202,000 miles. Techstream displayed the P0A9C code. Also, two low voltage cells that I will replace after balancing the remaining cells. My question is, is the sensor in the ECU box inside the hybrid battery or in another location? Any assistance is appreciated.
     
    #1 TwoPriusInTenn, Jun 19, 2022
  2. TMR-JWAP

    TMR-JWAP Senior Member

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    This code is for the temp sensors mounted on the bottom of the modules. Did you forget to plug the harness in? Or perhaps you broke one of the wires while disassembling/assembling the battery?
     
    #2 TMR-JWAP, Jun 19, 2022
    PriusCamper likes this.
  3. TwoPriusInTenn

    TwoPriusInTenn Member

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    Thank you. My daughter bought this car a while ago. I haven't done anything to the HV battery. The code appeared when I ran codes with my Techstream. Just doing a little research before I change and balance out the cells. On the 2nd Gen, there are 3 wires that intermittently connect to the top of the cells with clips. Are these what you are speaking of? (they clip to the bottom of the cells on 3rd Gen).
     
    #3 TwoPriusInTenn, Jun 20, 2022
  4. TMR-JWAP

    TMR-JWAP Senior Member

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    Hmmm.. that's odd. I could have swore that on those hundreds of Gen 2 HV batteries I've disassembled that the 3 temperature thermistors were located on the bottom of the modules....:) I'll have to take a look and check again. Either way, yes, those are the sensors.
     
    #4 TMR-JWAP, Jun 20, 2022
  5. TwoPriusInTenn

    TwoPriusInTenn Member

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    Thank you.
     
    #5 TwoPriusInTenn, Jun 20, 2022
  6. TwoPriusInTenn

    TwoPriusInTenn Member

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    I did not mean to offend you. Just making sure I understood. Thanks again.
     
    #6 TwoPriusInTenn, Jun 20, 2022
  7. TMR-JWAP

    TMR-JWAP Senior Member

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    No offense taken, lol. Just playin around! I'm as happy as can be, just did the chicken dance with an $80 fob from ebay and it worked like a charm!! Now I have 2 working fobs for the backup car!!
     
    #7 TMR-JWAP, Jun 20, 2022
  8. TwoPriusInTenn

    TwoPriusInTenn Member

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    I love it when a plan comes together! Congrats!!!
     
    #8 TwoPriusInTenn, Jun 20, 2022
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