IS - 1st Gen (2001-2005) Discussion about the IS models up to the 2005 model

how to replace bank 2, o2 sensor

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Old 02-14-11, 06:04 PM
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Avarec
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Default how to replace bank 2, o2 sensor

i recently had cel on for it, its the one underneath the pass side

has anyone done it?
Old 02-15-11, 06:34 AM
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Justin727
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Yep. Had myself a sensor socket popped it out. I took out the passenger seat as well mainly because it gave me a good excuse to clean the carpet under the seat. After I did that I just got under the carpet unplugged the sensor and swapped out the new one.
Old 02-15-11, 07:31 AM
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Avarec
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what code wore you getting? also you notice any gains in mpgs?
how to pop the socket off and will i need to lube it?
Old 02-15-11, 07:50 AM
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Justin727
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I dont remember exactly what code it was but it was b2 s2. I hit it up with PB blaster the evening before. Of course having oxygen sensor sockets make a big difference as well but you don't need them. A wrench should be plenty.

I took out the passenger seat first.
Then I got under the carpet and found the plug. Disconnected it and started pushing it thru its plug hole. If I remember correctly the new sensor should could with the rubber plug to seal the hole it comes thru.
Lifted up the car and proceeded to remove the sensor from the exhaust.

Of course installation is reverse.
Old 02-15-11, 12:25 PM
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Avarec
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thank you sirr, i will be tackling this nuisance soon

where did you order youre o2 sensor from? u remember part number
Old 02-15-11, 12:47 PM
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Justin727
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Champion Toyota out of Texas. Ordered it thru them the last time I visited home and got my supraforums discount.
I do not remember it off hand.
BUT sparkplugs.com sells denso O2 sensors along with ngk which I have ran in toyotas for years and have not had a problem.
Old 02-15-11, 04:12 PM
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would it be necessary to take out the seat?
any other way of finding sensors tail
Old 02-16-11, 06:22 AM
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Justin727
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Possibly. Just loosen up the seat bolts(4) and lean it back. I just used it as an excuse to remove it.
Old 02-19-11, 06:51 AM
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Marketeer
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I didn't need to remove the passenger seat. Just reached under the seat under the carpet and poked the plug through.

Got the part from Sparkplugs.com for about $75. It was a 234-4517 Denso product.
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