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Coolant warning light

Discussion in 'Gen 2 Prius Main Forum' started by Harrywalpole, Jun 4, 2018.

  1. Harrywalpole

    Harrywalpole Junior Member

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    2008 Prius 182K Miles, high temp coolant warning comes on intermittently over 50mph, if I put cabin heat on it blows cold air. Coolant reservoirs levels OK, radiator took a quart , topped off this AM. Problem still there but less since ambient temp is 50d . Water pump is turning
     
    #1 Harrywalpole, Jun 4, 2018
  2. valde3

    valde3 Senior Member

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    If you had to add a quart to radiator then there was a lot’s of air in it. Probably there’s still air in it. Bleeding the engine cooling loop on gen 2 Prius is not easy.

    You don’t have check engine light on? If it’s there can be a fault with coolant control valve that causes the heater not to get coolant sirculation.
     
    #2 valde3, Jun 5, 2018
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