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replace 2004 bank1sensor1 O2 sensor?

Discussion in 'Technical Chat' started by mud_13, Mar 20, 2009.

  1. Mar 20, 2009 at 2:11 PM
    #1
    mud_13

    mud_13 [OP] New Member

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    I have a P0135 code on my 2004 2.7L extended cab Tacoma, which reads as malfunction in bank1 sensor1. I can see where the sensor sits ahead of the convertor on the exhaust, but the wire leads up into the floorboard through a rubber gromet. Can someone tell me where it goes and how to best access the end of the cable? Should I take off the passenger seat and somehow get under the carpet? I already have a replacement sensor that has the rubber gromet sitting on the wire between the sensor and plug.
    Thanks in advance for any help!
     
  2. Mar 20, 2009 at 6:51 PM
    #2
    98tacoma27

    98tacoma27 :POOPCORN: Staff Member

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    Welcome to TW! I have never replaced that sensor so I am not sure.

    Bump!!

    Some one chime in and help the man!!!
     
  3. Mar 20, 2009 at 7:03 PM
    #3
    TRD4x4858

    TRD4x4858 Taco Traitor!

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    BONE STOCK! lol
    pop the grommet loose and it should come out with the connector, disconnect it and put the new sensor in :D
     
  4. Mar 21, 2009 at 5:53 AM
    #4
    Janster

    Janster Old & Forgetful

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  5. Mar 21, 2009 at 7:25 AM
    #5
    mud_13

    mud_13 [OP] New Member

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    Thanks for the suggestions.

    I will try popping the grommet in hopes that there is enough slack for the connector to pull through the hole - sounds like a good idea. And thanks for the link to the '96 fix - it seems that the setup on the '04 is different.

    I will report back on how it went - maybe with some photos of the cable location...
     
  6. Mar 23, 2009 at 7:53 PM
    #6
    mud_13

    mud_13 [OP] New Member

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    I popped the grommet and found that there was no slack. I had to get under the carpet beneath the passenger seat to acces the plug - not much fun, but it is done. I had to go to the dealer to get the custom nuts that hold the sensor and its annoying mini heat shield in place - the oginal nuts were toast.

    I am attaching a couple of pictures - sorry for the blurry shot of the plug. the first photo shows the grommet from below and the second shows the wire coming up throught the floor and the plug under the carpet.

    grommet.JPG
    plug under carpet.JPG
     
  7. Mar 23, 2009 at 9:07 PM
    #7
    mud_13

    mud_13 [OP] New Member

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    Before too many others read this thread I have to admit to a mistake - I replaced the bank1 sensor2 sensor that reads an error message of P0141 - not the bank1 sensor1 sensor (P0135) that starts this thread. I had the P0141 message last fall, ordered the sensor, and cleared the error. When my check engine light came on last week, I assumed it was the same sensor even though it read as P0135 - bank1 sensor1.

    So, I will be ordering the other O2 sensor tonight and replacing it sometime next week. I'm not sure why I would have different codes from last fall and this spring...well, I will now have two new sensors.
     
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