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

Oxygen sensor

Discussion in 'Generation 1 Prius Discussion' started by yota93, Jul 18, 2011.

  1. yota93

    yota93 Junior Member

    Joined:
    Jul 15, 2011
    24
    7
    2
    Location:
    Missouri
    Vehicle:
    2001 Prius
    Model:
    I
    Does anybody know what the wire colors on the down stream o2 sensors represent? I think 2 are black 1 is red and 1 is purple. I looked for a way to access the connection of the down stream o2 sensor. I am going to cut and splice the the wires of the new o2 sensor.
     
    #1 yota93, Jul 18, 2011
  2. bobofky

    bobofky Member

    Joined:
    Jun 18, 2007
    107
    10
    0
    The down stream O2 sensor can be accessed by removing the floorboards in the passenger compartment. The pink (purple?) wire is for the O2 heater.
     
    #2 bobofky, Dec 19, 2011
  3. 1enigma1

    1enigma1 Junior Member

    Joined:
    May 16, 2005
    10
    0
    0
    Vehicle:
    2005 Prius
    Model:
    N/A
    So, does anyone know how to "remove the floorboards" in order to access the downstream O2 sensor? This is probably a simple thing, but helpful to know before I start pulling things apart.
     
    #3 1enigma1, Nov 24, 2012
  4. 3prongpaul

    3prongpaul Hybrid Shop Owner, worked on 100's of Prius's

    Joined:
    Jul 18, 2010
    954
    724
    1
    Location:
    Boulder Hybids, Boulder, CO
    Vehicle:
    2006 Prius
    Model:
    N/A
    You need to get the carpet out of the way to see what's going on. Remove the passenger side door threshold/kickpanel plastic trim then lift back the carpet from under the dash. Once carpet is peeled back enough you'll see the O2 connector on right side of "the hump" then a wire harness that goes through a rubber grommet into the floor. This is where you unhook the downstream O2 sensor from the car.
     
    #4 3prongpaul, Dec 1, 2012
(You must log in or sign up to post here.)