Gen 2 prius started smoking and won't drive, any ideas?

Discussion in 'Gen 2 Prius Main Forum' started by JoeDog99, Jul 22, 2026 at 10:17 AM.

  1. JoeDog99

    JoeDog99 Junior Member

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    I noticed it needed new coolant so i put some in yesterday

    Today it started smoking out of the driver side of the hood so i pulled over

    There was no fire and after the car cooled down i checked the coolant and seen it was mostly empty

    Is this likely a inverter, coolant pump issue or blown gasket head? Maybe the radiator?

    I can't drive it now so will need to have it towed but if its a major issue i won't bother and will just scrap it as its only work about 2 or 3k, so not worth spending thousands to repair it
     
  2. ChapmanF

    ChapmanF Senior Member

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    The smoke is probably from the inexpensive little inverter coolant pump. Once the magic smoke escapes, what's left of the pump tends to blow your AM2 fuse for you, which makes the car inoperable.

    You can unplug this connector to the pump, so it won't blow the next good fuse you put in for AM2, and then you can (gently) drive the car while waiting for your new pump to arrive.

    [​IMG]
     
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  3. pasadena_commut

    pasadena_commut Senior Member

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    ICE loop or inverter loop?
     
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  4. JoeDog99

    JoeDog99 Junior Member

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    But is there likely going to be anything needing repaired or replaced besides the coolant pump, you think?

    Almost all the coolant was gone that i just put in. Maybe a leak?
     
  5. JoeDog99

    JoeDog99 Junior Member

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    Inverter
     
  6. Hayslayer

    Hayslayer Active Member

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    An inverter coolant water pump electrical failure can result in smoke, but DOES NOT result in the loss of coolant. It DOES result in a very acrid smell, because the smoke is from the pump and potting material smoldering.
    50/50 chance an electrical failure will pop the AM2, which will electrically kill the car dash, completely. You would know it if that happened because the car would turn off, you wouldn't have any dash lights and no response when trying to start the car.

    But again, ICWP failure should not cause a loss of coolant.
     
  7. ChapmanF

    ChapmanF Senior Member

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    Typically, no. The pump fails, you change the pump, good to go.

    But the failed pump doesn't make coolant go away, so whatever leak you have is just a different thing you also need to fix.

    Conveniently, you'd be refilling the coolant after changing the pump anyway.