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02 sensor bank 1 sensor 1-Is this drivers side or Passenger

This is a discussion on 02 sensor bank 1 sensor 1-Is this drivers side or Passenger within the General Help forums, part of the LSx Technical Help Section category; I have a check engine light code P0135 on my 1999 LS1 Trans Am that I looked up and it ...

  1. #1
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    1999 Ram Air Trans Am

    02 sensor bank 1 sensor 1-Is this drivers side or Passenger

    I have a check engine light code P0135 on my 1999 LS1 Trans Am that I looked up and it says 02 sensor bank 1 sensor 1 and Im wondering if this is drivers or passenger side and is this the one closest to the motor and where is this located.Any help would be much appreciated.Thanks for your help.
    1999 Ram Air Trans Am-6 speed-Whisper lid,BG Ram Air,MS-4 cam,Thyphoon 85mm intake and throttle body,LT headers,Borla catback,#36 injectors,high volumn fuel pump,4:11 gears,sub frame connectors

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    Moderator 35th-ANV-SS's Avatar
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    02 35th LE Camaro SS

    You are correct. Bank 1 is the driver's side and sensor 1 is the O2 sensor upstream of the catalytic converter.

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    1998 Pontiac Formula LS6

    I think it's the upstream driver's side sensor. They're fairly simple to remove. You can always swap the upstream with the downstream sensor to isolate the problem. All four sensors are swap-able. In the books the sensors have been superseded by the same part no.

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    1999 Ram Air Trans Am

    Thanks for your help.I have long tube headrers so I believe Ill have to get it from under the car since they are at the back of the headers

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    Moderator 35th-ANV-SS's Avatar
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    02 35th LE Camaro SS

    You can access from underneath. I believe the wrench size is 7/8"


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