Slight shudder and then triangle- P0A7a code- What is it?

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by aleyoop, Dec 2, 2022.

  1. aleyoop

    aleyoop Junior Member

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    Hey Guys,

    I was driving my 2008 w/ 180k and at low speed acceleration (10 mph) i felt a slight shudder and the triangle of death came on. Car drove just fine and when i stopped and checked- it was the P0A7A code. Cleared the code and drove the car home. No other codes shown.

    This is the second time that the same things happened. Low speed acceleration--slight shudder and triangle. The first time it happened, the car drove very slow and wouldn't accelerate beyond that. I cleared the codes and for the last 1500 miles, its driven fine. This is now the second time w/ the same issue.

    Inverter pump and coolant was changed and i confirmed that it is working fine (i can hear/feel the noise and coolant is moving in the reservoir).

    Any ideas on what this could be?
     
  2. bisco

    bisco cookie crumbler

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    sounds like an intermittent problem, maybe due to poor connection/corrosion/rodents?
     
  3. TMR-JWAP

    TMR-JWAP Senior Member

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    There are 14(?) subcodes associated with a P0A7A to help narrow down the issue. Did you happen to get that before clearing it?
     
  4. aleyoop

    aleyoop Junior Member

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    I didn't see any subcodes. Is there any special way you're supposed to access those? I have a run of the mill obd
     
  5. SFO

    SFO Senior Member

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    Many like to use a 'mini-vci' cable (or better), and the dealer diagnostic software 'techstream' on a winblows device (can also emulate).
     
    aleyoop likes this.
  6. aleyoop

    aleyoop Junior Member

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    Hey Guys,
    So i got the triangle again and this time i ran techstream to identify it.

    It's the P0A7A-325 subcode. Any idea what this could be?

    The issue is always the same...slight shudder at low speed acceleration and then i get the triangle...car still works just fine. Mileage has been 4-5 mpgs lower than before as well...

    thank you so much!
     
  7. SFO

    SFO Senior Member

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