Upper O2 sensor vs Air/Fuel Ratio Sensor

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Crain, Feb 28, 2016.

  1. Crain

    Crain Junior Member

    Joined:
    Sep 7, 2015
    32
    1
    0
    Location:
    Muncy Creek,PA
    Vehicle:
    2009 Prius
    Model:
    N/A
    I was reading the o2 thread and ... are these two different names for the same part? Toyota only list an Upper O2 sensor when I search for Air/Fuel Ratio Sensor no hits.
    Thanks Don.
     
  2. Patrick Wong

    Patrick Wong DIY Enthusiast

    Joined:
    Mar 8, 2008
    18,181
    6,276
    0
    Location:
    Green Valley, AZ
    Vehicle:
    2015 Prius
    Model:
    Two
    The correct name is air/fuel ratio sensor, but the parts catalog probably has generic descriptions. That sensor is located in an "upper" position with respect to the catalytic converter.
     
  3. Crain

    Crain Junior Member

    Joined:
    Sep 7, 2015
    32
    1
    0
    Location:
    Muncy Creek,PA
    Vehicle:
    2009 Prius
    Model:
    N/A
    FWIW Toyota parts search calls it the Upper O2 sensor.
     
Loading...