*DIY* P0161 O2 sensor B2 S2 change (pics) - Lexus IS Forum
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post #1 of 118 (permalink) Old 08-18-2005, 03:13 AM Thread Starter
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*DIY* P0161 O2 sensor B2 S2 change (pics)

This is for the Bank 2 Sensor 2

I tried to make this as simple as possible... Enjoy!!

Unbolt all 4 bolts holding down the seat


Remove the plastic molding and lift up the carpet a little


When you take the seat out make sure you unclip the wires for the power seats that are under the seat. For air bag connections disconnect the battery and wait at least 90 seconds before disconnecting the SRS yellow connector.


Lift the carpet up enough to see the harness for the O2 sensor. You will need to unclip this. You can also see where the wire leads to under the car.



You will need to jack up the car to get to the sensor. Once you do that locate the 02 sensor and remove it.


Once I removed the sensor I re-scanned just to double check things and as you can see their is a 0.000v for the oxygen sensor 2 bank 2.



Now you need to wire the new sensor onto the harness. So make sure you match up the right wires

I connected the 2 Black to the 2 White...
1 White to the 1 Grey...
1 Blue to the 1 Black...


After you have the new sensor wired up just screw it back in (dont forget to add antisease on the thread of the sensor) and reconnect the harness that goes under the seat

I re-scanned to make sure the sensor is working. The pic is a little blurry but you can now see a value for oxygen sensor 2 bank 2


Now your all set just clip the carpet back in and put your seat back.


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Last edited by jasonm4; 05-03-2013 at 05:23 AM. Reason: added about disconnecting battery
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post #2 of 118 (permalink) Old 08-18-2005, 06:34 AM
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SOLDER THOSE CONNECTIONS!
those crimping connectors are not good enough.
also you can take the factory connectors apart, and install the new wires into the connector, rather than have that little mess in your car.

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post #3 of 118 (permalink) Old 08-18-2005, 01:50 PM Thread Starter
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Quote:
Originally Posted by Lextech1
SOLDER THOSE CONNECTIONS!
those crimping connectors are not good enough.
also you can take the factory connectors apart, and install the new wires into the connector, rather than have that little mess in your car.
Yeah... I know I should of but I didn't have a soldering gun with me... Its no biggie the wires are easy to get to, so Ill just do it later.

Thank for the input

Brandon

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post #4 of 118 (permalink) Old 08-18-2005, 01:56 PM
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Pardon my ignorance, but exactly does this accomplish?
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post #5 of 118 (permalink) Old 08-18-2005, 02:19 PM Thread Starter
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Quote:
Originally Posted by four20
Pardon my ignorance, but exactly does this accomplish?
changing the O2 sensor or soldering the connections?

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post #6 of 118 (permalink) Old 08-18-2005, 03:21 PM
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Awesome!! Thanks For The Diy!!
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post #7 of 118 (permalink) Old 08-18-2005, 03:24 PM
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Or incase you strip the O2 sensor and don't want to spend $40 in labor getting replaced, after spending $130 on the sensor itself?
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post #8 of 118 (permalink) Old 08-18-2005, 03:57 PM Thread Starter
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Quote:
Originally Posted by chrisCARL0S
Or incase you strip the O2 sensor and don't want to spend $40 in labor getting replaced, after spending $130 on the sensor itself?
I got a Bosch sensor for $78.79

Yeah I was worried about stipping the thread but patience, WD40, and a little elbow grease did the trick. I didn't even bust out the breaker bar.

When I put the new sensor in I used some antisease on the threads

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Last edited by Brandon714; 08-18-2005 at 04:07 PM.
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post #9 of 118 (permalink) Old 08-18-2005, 05:17 PM
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Quote:
Originally Posted by chrisCARL0S
Or incase you strip the O2 sensor and don't want to spend $40 in labor getting replaced, after spending $130 on the sensor itself?
LOL yeah that's what I was looking for. Not the soldering part haha. I thought this was some type of mod at first.
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post #10 of 118 (permalink) Old 08-18-2005, 06:16 PM Thread Starter
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Quote:
Originally Posted by four20
LOL yeah that's what I was looking for. Not the soldering part haha. I thought this was some type of mod at first.
so what are you trying to say? that this thread is useless...

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post #11 of 118 (permalink) Old 08-18-2005, 06:26 PM
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why would you cut the wires?...wouldn't the new O2 sensor come with the harness so you can clip it in the factory connection, assuming you got your sensor from the dealer of course?

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post #12 of 118 (permalink) Old 08-18-2005, 06:44 PM Thread Starter
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Quote:
Originally Posted by wingzero
why would you cut the wires?...wouldn't the new O2 sensor come with the harness so you can clip it in the factory connection, assuming you got your sensor from the dealer of course?
nope... I didn't get the sensor from the dealer. I bought a Bosch for less than $80 from a local parts store (with a special discount) I didn't mind cutting the wires it took me less than 10min to wire it up.

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post #13 of 118 (permalink) Old 08-18-2005, 06:51 PM
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Quote:
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so what are you trying to say? that this thread is useless...
Haha nah man, gj. How-to's are always welcome!
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post #14 of 118 (permalink) Old 08-18-2005, 07:42 PM
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Brandon 714.....good job.

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post #15 of 118 (permalink) Old 08-18-2005, 08:29 PM
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Quote:
Originally Posted by Lextech1
SOLDER THOSE CONNECTIONS!
those crimping connectors are not good enough.
also you can take the factory connectors apart, and install the new wires into the connector, rather than have that little mess in your car.
i must be retarded, because i tried this, and failed. the stock connections have to be torn apart to take the wire off. and then the green wire grommet cant be taken off easily. does it matter which black wire goes in which place? since theres two...

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Last edited by AltezzaBob; 08-18-2005 at 08:35 PM.
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