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Coolant pump change leaves me with temperature warning.

Discussion in 'Gen 2 Prius Technical Discussion' started by Britmerican, Sep 25, 2018.

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  1. Britmerican

    Britmerican New Member

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    I swapped out the coolant pump as I was getting code p1121. The error went away, but then I noticed a whirring for a few seconds when I start the car (I assume from the new pump) then nothing (the car starts normally other than that). I bled the coolant, but it only pumped half way up the tube I was feeding into the overflow reservoir. No air showed in the tube other than that.

    Now, when I drive, if I press the accelerator a little more (driving up a large hill, for example) I get the warning light and it shows me the high coolant temperature symbol on the screen. Is there something i failed to do, or something I should check to see if I can resolve this?
     
    #1 Britmerican, Sep 25, 2018
  2. bisco

    bisco cookie crumbler

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    welcome!
    there could still be air, or a bad thermostat.
     
    #2 bisco, Sep 25, 2018
  3. Britmerican

    Britmerican New Member

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    So best to try to bleed it again? Will try that tomorrow.
     
    #3 Britmerican, Sep 25, 2018
  4. James1964

    James1964 Member

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    I just changed the inverter coolant in my 05. I followed the procedure nutz and bolts showed on their you tube. I did notice bubbling and gurgling sounds when first refilling the coolant reservoir. Try their sequence.

    Posted via the PriusChat mobile app.
     
    #4 James1964, Oct 4, 2018
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  5. Britmerican

    Britmerican New Member

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    I did bleed it again and it worked. It looks like I didn't open the nipple enough. I got a good quick flow and after 1 minute it so, I had air come through. Then I had gurgling and had to top up.

    So glad this worked. Thanks everyone.
     
    #5 Britmerican, Oct 5, 2018
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