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P261C engine coolant pump b control circuit ow, what does this code mean

Discussion in 'Gen 3 Prius Care, Maintenance & Troubleshooting' started by Aftab Ak, Nov 8, 2018.

  1. Aftab Ak

    Aftab Ak Junior Member

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    I got p261c error code what does it mean, my engine light suddenly comes on and a warning light, car is prius 2011, please help
     
    #1 Aftab Ak, Nov 8, 2018
  2. bisco

    bisco cookie crumbler

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    not sure that is a correct code, are you using tech stream?

    it could be that you need to replace the 3 way coolant control valve
     
    #2 bisco, Nov 8, 2018
  3. Aftab Ak

    Aftab Ak Junior Member

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    not sure but someone told me to replace water pump, a warning along with engine light is on but the car drives good and suddenly some other lights come on as well and the car stops, then I restart the car and the car drives again with the engine light and warning light on, don't know what to do
     
    #3 Aftab Ak, Nov 8, 2018
  4. bisco

    bisco cookie crumbler

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    check the inverter fluid reservoir with the car in ready. there should be movement in the fluid
     
    #4 bisco, Nov 8, 2018
  5. Aftab Ak

    Aftab Ak Junior Member

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    yes dude there is moment in the inverter fluid
     
    #5 Aftab Ak, Nov 9, 2018
  6. Aftab Ak

    Aftab Ak Junior Member

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    yes dude there is moment in the inverter fluid
     
    #6 Aftab Ak, Nov 9, 2018
  7. Patrick Wong

    Patrick Wong DIY Enthusiast

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    The "someone" is correct. Stop driving the car. Replace the electric engine coolant pump.
     
    #7 Patrick Wong, Nov 9, 2018
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  8. Aftab Ak

    Aftab Ak Junior Member

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    hmmmm okay, can you please share it's picture I mean electric engine coolant pump
     
    #8 Aftab Ak, Nov 9, 2018
  9. Patrick Wong

    Patrick Wong DIY Enthusiast

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    #9 Patrick Wong, Nov 9, 2018
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  10. m.wynn

    m.wynn Senior Member

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    It's not a bad idea to add the thermostat to this job. It's positioned directly opposite the engine casting where the water pump mounts and only adds 35 USD to the job:


    2011 TOYOTA PRIUS Water inlet sub-assy, w/thermostat. Inlet sub-assy, wate - 1603137010 | Toyota Parts Overstock


    I did a preemptive engine water pump replacement on my late, great 2010, using the Aisin WPT-190. It is indeed the oem pump, with the words Toyota and Aisin actually ground off. You can view the grindings in this pic and Youtube video:

     

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    #10 m.wynn, Nov 10, 2018
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  11. ASRDogman

    ASRDogman Senior Member

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    It's always best to replace the thermostat when you replace the water pump. And to back flush the system.
    It really can't hurt.
     
    #11 ASRDogman, Nov 10, 2018
  12. Nino nikki

    Nino nikki New Member

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    P261b is engine water pump failure
    P261c is no power to pump. Check fuse first second check connection

    If you have p261b do the work yourself. It's pretty easy and save a lot of money. Buy oem part on eBay/Amazon. Check YouTube for installation guide.
     
    #12 Nino nikki, Sep 7, 2019
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