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HELPPP, o2 sensor wont come off and dont know which one to replace

This is a discussion on HELPPP, o2 sensor wont come off and dont know which one to replace within the General Help forums, part of the LSx Technical Help Section category; well first it is seized on and any help on that. plus my code i threw was PO155 and not ...

  1. #1
    Senior Member greatwhiteZ28's Avatar
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    HELPPP, o2 sensor wont come off and dont know which one to replace

    well first it is seized on and any help on that.

    plus my code i threw was PO155 and not sure if that is DRV or PASS side but i do know its behind the cats

    please helpp thanks

  2. #2
    Senior Member greatwhiteZ28's Avatar
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    auto zone told me it was the sensor after the cats, and local store told me it was the one in front.

    then called again and guy said its bank 2 sen 1

    then dealer said there is 3 diff types for years and neede d vin, then gave to me.

    but bolt is still not moving

    put lots of wd 40 on it and almost broke my healed bone in my arm again, soo gave it quits for tonight

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    Member ultra_badass's Avatar
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    navy blue matallic
    2000 WS6 trans am M6

    its the one in front and on the passenger side good luck with getting it off

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    Senior Member greatwhiteZ28's Avatar
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    i really cant believe how stupid these peple making 6 $hr giving car info????

    thanks

    and any tips casue i sorda tried that front one and seemed like there is noooooo way for a wrench to get in there.

    and what would the could be for the PASS rear o2? or it the same #?

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    Senior Member greatwhiteZ28's Avatar
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    also to add i pluged in that one to the new o2 sens and still there was a SES light on, and di that do the rear one to. with out screwing in, just being connected. wouldnt that make the code go away???

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    Life in the Fast lane sunsetorangess's Avatar
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    Im pretty sure plugging in the sensors would actualy cause more codes.
    If you cant get it loose then i would get the car to op. temp and try again, becareful thou, its gonna be hot.
    If you can get the car scanned again and post the code.

    Bank 1 sensor 1 = Driver side front, Befor cat
    Bank 1 sensor 2= driver side rear, Aft cat
    Bank 2 sensor 1= Passenger front
    Bank 2 sensor 2= Passenger rear
    The sensor needs to be in the exhaust inorder to take a correct reading or you will throw codes. You will also have to reset the computer by either driving it a bit or disconnecting the battery for a while.
    J
    2001 SS, Its not the car its the Driver that matters....

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    Senior Member greatwhiteZ28's Avatar
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    Quote Originally Posted by sunsetorangess View Post
    Im pretty sure plugging in the sensors would actualy cause more codes.
    If you cant get it loose then i would get the car to op. temp and try again, becareful thou, its gonna be hot.
    If you can get the car scanned again and post the code.

    Bank 1 sensor 1 = Driver side front, Befor cat
    Bank 1 sensor 2= driver side rear, Aft cat
    Bank 2 sensor 1= Passenger front
    Bank 2 sensor 2= Passenger rear
    The sensor needs to be in the exhaust inorder to take a correct reading or you will throw codes. You will also have to reset the computer by either driving it a bit or disconnecting the battery for a while.
    J

    dude thanks alot, big help.

    soo your saying its easier to remove when the car is warmed up?

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    Senior Member kool-aide's Avatar
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    Sebring Silver Metalic
    2002 Camaro Z28

    do you have that funny little socket they make for taking off O2s?

    I had the drv side before cat in my way of a motor mount change. I had plenty of room to get a BIG adj wrench in there. I needed at least a 1/2 in drive size wrench to break it free. My adj wrench was longer which allowed me to get plenty of leverage to muster up the torque to get that sucker loose.

    It wasn't too tough but enough to make me swear when it broke loose and donated a good chunk of flesh off my fingers.

    it wasn't until i was flipping through a tool mag that i saw (and remember) the O2 socket.

    I think the hot cat idea is like using a torch on it. But man it is going to be hot as hell though. You can't break it loose cold, you just need to find the right tool.

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