P1121 - Coolant Control Valve Replacement (with pics)

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Stomper88, Jan 24, 2012.

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  1. eluo

    eluo Member

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    Looks like I need to replace the valve again after 11 years. Didn't get the code yet but started hearing the valve noise. Would you mind sharing the eBay seller info that sold you the Denso valve?
     
    #181 eluo, May 4, 2025 at 11:07 PM
  2. MAX2

    MAX2 Senior Member

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    The small potentiometer in the three-way valve breaks down.
    You can replace it yourself by disassembling the valve. This will save you a hundred dollars.
    TOCOS RVQ121 Ceramic Potentiometer 12V 502 5K with Plate PPS-GF40 360 1PC | eBay
     
    #182 MAX2, May 5, 2025 at 12:41 AM
    JC91006 likes this.
  3. JC91006

    JC91006 Senior Member

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    Looks like parts from China, the Amazon/eBay valves all fail in about a year and are $20. This part that's $15, maybe not worthwhile unless there's a quality part that will last?
     
    #183 JC91006, May 5, 2025 at 1:19 AM
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