1. Attachments are working again! Check out this thread for more details and to report any other bugs.

2018 Prius coolant fan keep running while the car just start and the engine is cold

Discussion in 'Gen 4 Prius Care, Maintenance and Troubleshooting' started by Daniel 741741, Sep 5, 2024 at 3:07 PM.

Tags:
  1. Daniel 741741

    Daniel 741741 New Member

    Joined:
    Yesterday
    1
    0
    0
    Location:
    Palm Desert
    Vehicle:
    2018 Prius
    Model:
    Two Eco
    我的维修普锐斯,got a very low mileage,around 35mpg,I think the problem is that coolant fan keep running while car just start and the engine is cold ,I don’t have any engine light on the car
     
    #1 Daniel 741741, Sep 5, 2024 at 3:07 PM
    Last edited by a moderator: Sep 5, 2024 at 3:54 PM
  2. BiomedO1

    BiomedO1 Senior Member

    Joined:
    Mar 27, 2021
    1,575
    834
    0
    Location:
    SacTown, Ca
    Vehicle:
    2021 Prius Prime
    Model:
    LE
    Welcome Daniel,
    Need more information. If the AC is on, that will force the cooling fans on. Just because you don't have a CEL on, doesn't mean there isn't a problem. You may have a bad sensor that still within specifications but sending bad data to the ECU. If the sensor was totally dead, too high or too low, that would trip a CEL.
    Get the car scanned then report back...

    Good Luck.....
     
    #2 BiomedO1, Sep 5, 2024 at 7:23 PM
    Daniel 741741 likes this.
  3. douglasjre

    douglasjre Senior Member

    Joined:
    Sep 13, 2008
    1,919
    664
    0
    Location:
    Orlando, FL
    Vehicle:
    2010 Prius
    Model:
    ----USA----
    Land rovers were famous for electrical Gremlins like that. They used to keep all the relays under the driver seat where they got wet from off-writing and snow in the winter from the boats. Lucas electric for the win(y)
     
    #3 douglasjre, Sep 5, 2024 at 10:17 PM
(You must log in or sign up to post here.)