CEL: Oxygen Sensor - Lexus IS Forum
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post #1 of 13 (permalink) Old 01-08-2007, 06:24 AM Thread Starter
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CEL: Oxygen Sensor

I got a CEL and the dealership told me it was the oxygen sensor on the right bank.

Now, I like to think that I know cars, but when my wife asked me what the O2 sensor was and what it did, I could only give a reasonable approximation of what I thought it did. Can anyone help?

By the way, the $500 I paid for the extended warranty from CarMax just paid off. It was $460 for the repair. I know we all hear about people who buy used cars and think the extended warranty is a ripoff, but with CarMax it was easy to make the claim and close it out. I just owed the dealership the $75 deductable.
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post #2 of 13 (permalink) Old 01-08-2007, 07:03 AM
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Huge fan of the extended warranty.
So far ECP has covered my steering rack and linkage, exhaust manifold including the O2 sensor. Mine wasn't $500 though,

I had Lexus include it ($1500CDN) when I purchased the car

HappySMP
2002 Stage II L-Tuned IS300 - My Build Thread
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post #3 of 13 (permalink) Old 01-13-2007, 03:26 PM
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Hmm... "Right Bank O2 Sensor"... on an inline 6 engine? I'd be asking them what car they were working on.

The O2 sensors only cost about $100 each and usually aren't too hard to replace yourself.

Regarding your question... this link should give ya everything you need to know :-)

http://auto.howstuffworks.com/question257.htm

Brian

2006 BMW 330i - 6spd, Sport

2001 Lexus IS300 - Auburn Sky Pearl (233k miles)
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post #4 of 13 (permalink) Old 01-15-2007, 04:51 AM
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I just took B2S2 out and cleaned it with compressed air then put it back.
It was a little loose when I took it out so probably
that was why CEL was on.
Reseted ECU and no CEL so far
If CEL comes back on, then I found the sensor for $105 on ebay (Bosch, new)
My car is a 2001 IS300
Here some pics:
"Y" Pipe sensor:

I had to take the passenger seat out to unplug the sensor.

The sensor out:

The tool kit from Advance Auto Parts (rented):
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post #5 of 13 (permalink) Old 01-30-2007, 03:05 PM
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I just put on a megan racing down pipe, and I must say the the O2 sensor was bitch to get off! I had to heat it up with a torch, and now it is basically stripped, so I could not tighten that much when I put it back on.
Anyway
Apparently it was fine until just an hour ago I was driving and the CEL and flashing traction off light came on.
So I have a question, do you think I need to replace my O2 sensor, or should I just bring it somewhere and get it tightened more, and see what happens? And what will they say if I bring it to the dealership? Will it be covered by the warranty? Or will they say tough shit?

thanks

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post #6 of 13 (permalink) Old 01-30-2007, 09:05 PM
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I can assure you it WILL NOT be covered under warranty. You messed it up and as soon as they see the aftermarket part on there then they will stop work and tell you sorry.

2003 GGP, 5 speed w LSD, HP header, Y pipe, Borla Exhaust, SRT intake RECU, B&M with Razo 400g.
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post #7 of 13 (permalink) Old 01-30-2007, 11:06 PM
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replaced mine when the cel came up; cost me $110 for the o2 sensor.
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post #8 of 13 (permalink) Old 01-31-2007, 07:10 AM
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But the CEL won't go off by just tightening the o2 sensor?
And can I not turn traction off while the CEL is on?

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post #9 of 13 (permalink) Old 01-31-2007, 07:38 AM
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I just replaced mine myself.... I got the OEM part from lex for 176.00 well worth the xtra 66.00 so i didnt have to cut/match up any wires... it was just plug and play... took me all of 30 min to do...the CEL for an O2 sensor shouldnt have anything to do with your trac button... if trac wont work you have another issue.... You probably ruined it with the torch.... I'd get a new one throw some anti-seize on there and plop that bitch in and be done with it..

01 IS300 bpm
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post #10 of 13 (permalink) Old 01-31-2007, 03:39 PM
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my trac off button has been flashign since my CEL came one. Is that normal?
And I think I saw it do that on another IS too.

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post #11 of 13 (permalink) Old 01-31-2007, 06:44 PM
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And I would like to add that I think it is stupid that I have to pay for a new o2 sensor just because I put on a new downpipe. I don't even understand what causes the problem, why does it make the CEL go off?

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post #12 of 13 (permalink) Old 02-01-2007, 06:47 AM
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The down pipe probably isnt your problem.... It was heating it up with a torch to get it off initially..... when you crank on those things they break... sensitive.... make sure you put anti-seize on there when you throw the new one on and you wont have an issue....

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post #13 of 13 (permalink) Old 02-01-2007, 02:36 PM
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Now, I have to get an O2 simulator too

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