2014 Prius Plug In Fuel Tank Sensor Issue

Discussion in 'Gen 1 Prius Plug-in 2012-2015' started by David R. Kaufman, Jul 25, 2026 at 3:00 PM.

  1. David R. Kaufman

    David R. Kaufman New Member

    Joined:
    Saturday
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    Location:
    Denver Colorado
    Vehicle:
    2014 Prius Plug-in
    Model:
    Plug-in Base
    I noticed the rush of air coming from my gas tank and trouble pumping gas into the tank with repeated shut offs at the pump. Ran obt 2 scan and got the code P1453/ Fuel tank Pressure Sensor High Input. I searched on YouTube and google on how to access the Fuel tank pressure sensor so I could check the voltage and the sensor itself. There were no videos or pictures on how to gain access to the pressure sensor. I read it’s located under the back seat and possibly underneath the car. Any help or advice would be appreciated !
     
    #1 David R. Kaufman, Jul 25, 2026 at 3:00 PM
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    To access the internals of a Generation 3 Toyota Prius (2010–2015) gas tank, remove the rear seat cushion, peel back the floor service hole cover, and disconnect the fuel lines and electrical plug before turning the fuel pump lock ring counterclockwisewatch

    Faulty Fuel Tank Pressure Sensor: The sensor is stuck sending a high voltage signal (near 5V).
    • Damaged Wiring: Frayed wires or corroded connectors near the fuel pump assembly or EVAP canister.
    • Stuck or Bad EVAP Vent Valve/Solenoid: A valve failing to open or close right, disrupting the system circuit.
    • Loose Gas Cap: A bad

    223535_2010_Toyota_Prius_Repair_Manual_-_Fuel_Tank_and_Pump.pdf

    fuel-system--fuel-system-components

    good luck!
     
    #2 bisco, Jul 27, 2026 at 2:54 PM
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