Prius new engine and coolant pump Trouble code

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by Jaybeans, Mar 26, 2024.

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  1. Jaybeans

    Jaybeans New Member

    Joined:
    Mar 26, 2024
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    Vehicle:
    2012 Prius v wagon
    Model:
    Five
    I had blown head gasket on my 2013 Toyota Prius V wagon. So I got a JDM engine and transmission installed. The car was running fine for a week then boom car started losing power on the highway and struggling to maintain speed. Had Christmas lights lit up on dashboard and CEL indicating two codes 1) P261C and 2) P261B engine coolant pump motor B
    I checked the fuses and it had a blown coolant pump fuse so I replaced it. It still was having same problem. So then I replaced the water/coolant pump. I’m having the same problem. Has anybody encountered the same problem? Any advice would be appreciated
     
    #1 Jaybeans, Mar 26, 2024
  2. rjparker

    rjparker Tu Humilde Sirviente

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    Vehicle:
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    Model:
    Three
    Did you try head gasket sealer on the old engine which may still be in the system due to the radiator, cabin heater and exhaust heat exchanger?

    Did you replace the engine water pump or the inverter water pump?

    Did you use a Toyota pump or aftermarket?

    Did you check the fuse again?

    Did you check the water pump relay?

    Do you have access to a bidirectional scanner?
     
    #2 rjparker, Mar 27, 2024
    Last edited: Mar 27, 2024
    Tim Jones likes this.
  3. Mendel Leisk

    Mendel Leisk Senior Member

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    Model:
    Touring
    Prius v engine and transaxle?
     
    #3 Mendel Leisk, Mar 27, 2024
    Tim Jones likes this.
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