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Red triangle after replacing coolant control valve

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by srjacob, Jun 5, 2014.

  1. srjacob

    srjacob Junior Member

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    RE: 2004 Prius, 98K miles

    I recently replaced the coolant control valve (received code P1121) and added coolant. Trouble codes were cleared. I am now getting the red triangle intermittently. When I drive the car, after a few minutes, the red triangle comes on. I can shut off the car, and turn it back on, and the red triangle comes back after a few minutes. The car seems to drive normally.

    I have the mini VCI cable and the Toyota TIS software. There are no trouble codes present, but I am getting the red triangle.

    Does anybody know what is going on, and how to fix it?

    Thanks in advance.

    Steve
     
    #1 srjacob, Jun 5, 2014
  2. JC91006

    JC91006 Senior Member

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    Well I would suggest you check the usual oil and coolant levels. Make sure all the air is out of the coolant loop.
     
    #2 JC91006, Jun 5, 2014
  3. TampaPrius.com

    TampaPrius.com Active Member

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    +1 on air in coolant loop.
     
    #3 TampaPrius.com, Jun 5, 2014
  4. nh7o

    nh7o Off grid since 1980

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    Use the real time monitor function in techstream to look at your engine temperature. It should be close to 90C or less.
     
    #4 nh7o, Jun 6, 2014
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