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2007 Prius P1121 Code

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Meh1483, Jan 29, 2018.

  1. Meh1483

    Meh1483 Junior Member

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    First time poster Here! Forgive me if I'm clueless. My 2007 Prius with 102,500 miles has been making a strange noise (see YouTube link below) and now the check engine light has come on. I checked the code at AutoZone and it's P1121. How urgent is this to repair? The check engine light disappeared yesterday and is back on today. Should I have the coolant level checked? I'm definitely not a DIYer. I see that I should only use the Toyota Super Long Life coolant. I'm not sure if that's what I have in there now, so if it's low, should I have it flushed before I add the Toyota coolant or just top it off? Thanks so much for any advice!

     
    #1 Meh1483, Jan 29, 2018
  2. padroo

    padroo Senior Member

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    #2 padroo, Jan 29, 2018
  3. padroo

    padroo Senior Member

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    Short video telling you how to check your coolant. His advice is pretty good except his coolant should be pink and not green.


     
    #3 padroo, Jan 29, 2018
  4. SpaceCityHybrids

    SpaceCityHybrids Member

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    Coolant valve is a common issue on these cars. It's not a difficult DIY fix if you have some experience on cars. You can find the part on Amazon.
     
    #4 SpaceCityHybrids, Jan 30, 2018
  5. Figster10

    Figster10 Member

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    Is that low train choo choo sound he has in the video related to the coolant control valve going out?
     
    #5 Figster10, May 20, 2019
  6. ruggb

    ruggb Junior Member

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    looks like I would recommend buying this part at a local parts place since apparently, it isn't uncommon for it to need replacing again.... and again...I replaced mine in April 2019. It is Nov 2019 and the P1121 came back. I refilled the overflow tank and it went away for about 30 days. Now it is back and everything is still full, so I guess I need to warranty replace this part AGAIN. Is there a good reason these parts keep jamming up?????
     
    #6 ruggb, Nov 25, 2019
  7. dolj

    dolj Senior Member

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    Not really, they should last a good long time. Maybe look at your methods, or the parts you are using.

    I wouldn't recommend using old parts unless you like doing the job over and over.

    What Parts and coolant (Brand/Type) are you using?
     
    #7 dolj, Nov 26, 2019
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