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  1. PrestonH2O
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    P1121 Fail fix

    I tried to fix my p1121 error code by replacing the 3-way coolant control valve. I even got OEM. I ended up spilling all the coolant on the...
    Thread by: PrestonH2O, Aug 10, 2025, 5 replies, in forum: Gen 2 Prius Care, Maintenance and Troubleshooting
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