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thermostat location

Discussion in 'Gen 3 Prius Main Forum' started by franken1313, Apr 20, 2018.

  1. franken1313

    franken1313 Member

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    I'm getting P0117 Engine Coolant Temperature Circuit Low Input on a generic scanner. 100k miles
     
  2. Raytheeagle

    Raytheeagle Senior Member

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    Now we're getting somewhere:).
     

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  3. franken1313

    franken1313 Member

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    I have to check the wires?
     
  4. Raytheeagle

    Raytheeagle Senior Member

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    That’s from the repair manual;).

    It walks you through what to do to troubleshoot the P0117.

    If you’ve checked and double checked the simple stuff, that decision tree procedure will get you to the root cause:).
     
  5. franken1313

    franken1313 Member

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    I haven't replaced the temperature sensor.
     
  6. Raytheeagle

    Raytheeagle Senior Member

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    So a recap:

    • Engine was overheating
    • Replaced water pump only
    • Filled with coolant
    • Engine still overheats
    If the above is true, I’d do the thermostat ;).
     
  7. franken1313

    franken1313 Member

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    I just replaced the thermostat today still overheating
     
  8. franken1313

    franken1313 Member

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    If the temperature sensor is bad would I still be getting normal acurate temperature readings?
     
  9. Raytheeagle

    Raytheeagle Senior Member

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    One way to check is with a thermometer or an infrared gun;).

    I’d check the temp in the reservoir with an IR gun and compare it to what you are seeing in your scan device.

    Any accidents or front end damage to your Prius?
     
  10. franken1313

    franken1313 Member

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    Yes front end damage. I believe the temperature readings I'm getting is acurate. Does that usually mean the temp sensor is not bad?
     
  11. Raytheeagle

    Raytheeagle Senior Member

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    It could be reading accurate. Any damage to the radiator?

    If it’s still overheating, it might be a blockage.

    Any pictures of the damage?

    This might be the explanation to your AC issues as well.
     
  12. franken1313

    franken1313 Member

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    The radiator might be a little bent that's about it. I have no heater at all
     
  13. Raytheeagle

    Raytheeagle Senior Member

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    Where is it bent at and how hard or how much damage didbthe impact cause? I bet it is impeding flow and this is why both the heater and engine coolant are not flowing correctly.
     
  14. franken1313

    franken1313 Member

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    The Passanger side was bent. The upper corner mostly
     
  15. Raytheeagle

    Raytheeagle Senior Member

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    I’ve never had thebfront of the Prius off, but that might be where the return of the loop is. Might be worth ensuring no damage beforebthrowing more parts at your Prius.
     
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  16. Ayan

    Ayan New Member

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    Same problem here, coolant overheats within minutes and having cold cabin heater. had P0117 error code "engine coolant input low"
     
  17. franken1313

    franken1313 Member

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    My problem turned out to be the water pump. It wasn't bad enough to throw a code but after replacing it everything was fine.
     
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