O2 sensor

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Nov 12, 2005 | 07:20 PM

asci01

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Joined: Mar 2003

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From: Florida

O2 sensor

I'm confused.

How many O2 sensors are there in a 2nd gen GS300?

Is it three or four?

Nov 13, 2005 | 10:31 AM

VVT-i

Lexus Champion

Joined: May 2002

Posts: 2,781

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From: Georgia

They are 4 of them. Two main sensor before cat. and 2 sub sensors after cat.

Dec 25, 2005 | 08:21 PM

enterconne

Driver

Joined: Oct 2005

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From: az

have you ever changed any of the sub sensors out?? if so, were they easy and how do you do it??

Dec 26, 2005 | 10:44 AM

asci01

Thread Starter

Pole Position

Joined: Mar 2003

Posts: 316

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From: Florida

Quote:

Originally Posted by enterconne

have you ever changed any of the sub sensors out?? if so, were they easy and how do you do it??

I don't know what you mean by sub sensors, but I did change the O2 sensor. Piece of cake with the O2 special tool (~$7.00) at pepboys or you can try to use an open wrench of the right size, but to me the tool was worth the $7.00.

Dec 26, 2005 | 12:52 PM

enterconne

Driver

Joined: Oct 2005

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From: az

the O2 sensor is the one after the cat right?

Dec 26, 2005 | 12:54 PM

enterconne

Driver

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From: az

by the way, sweet setup with the PC.

Dec 26, 2005 | 02:17 PM

asci01

Thread Starter

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Joined: Mar 2003

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From: Florida

Quote:

Originally Posted by enterconne

by the way, sweet setup with the PC.

Thanks.

The 2nd gen GS3 has three O2 sensors. One for Bank 1 (cylinders 1,2 and 3) before the cat. One for Bank 2 (cylinders 4,5 & 6) before the cat. The third sensor is after the cat where the exhaust pipes join underneath the car but before they separate again.

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Dec 28, 2005 | 04:47 AM

enterconne

Driver

Joined: Oct 2005

Posts: 185

Likes: 0

From: az

http://us.lexusownersclub.com/forums...e=post&id=3122

check this out!!

Dec 28, 2005 | 09:13 AM

#10

asci01

Thread Starter

Pole Position

Joined: Mar 2003

Posts: 316

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From: Florida

Quote:

Originally Posted by enterconne

http://us.lexusownersclub.com/forums...e=post&id=3122

check this out!!

Great find.

Yeap, 161 is Bank 2 Sensor 2 failure.

Check the codes here:

http://www.troublecodes.net/Lexus/

That's the hardest sensor to change because it requires more things to take apart.

Send a quote request to lexus-parts.com. They gave me the best price and offer 1 year warranty. Most other places don't have the OEM and offer no warranty.

Dec 30, 2005 | 08:16 PM

#11

enterconne

Driver

Joined: Oct 2005

Posts: 185

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From: az

sensor replaced!!!! thanks for the help.

Jan 1, 2006 | 07:04 AM

#12

asci01

Thread Starter

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Joined: Mar 2003

Posts: 316

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From: Florida

Quote:

Originally Posted by enterconne

sensor replaced!!!! thanks for the help.

You're welcome. If you need to reset the check engine light, you can disconnect the negative cable from the battery for about half hour, although there're other ways to do it.

Happy New Year!