Clarification: changing out oxygen sensors on 1998 LS400
#1
Driver
Thread Starter
Clarification: changing out oxygen sensors on 1998 LS400
Good Saturday morning to everyone. In my ongoing replacement of parts on my car,
I have finally decided to swap out the oxygen sensors. In my reading on this forum and others, I see our cars have 4 oxygen sensors. Am I correct on this?
Also, since I am getting ready to order the OEM replacments online, I wanted to make sure. Are there 2 updraft and 2 downdraft, or what configuration are they? I would appreciate feedback from anyone who might know, or from someone who has replaced them on a 98-00 model.
Thanks in advance to all you LS experts out there in CL land.
I have finally decided to swap out the oxygen sensors. In my reading on this forum and others, I see our cars have 4 oxygen sensors. Am I correct on this?
Also, since I am getting ready to order the OEM replacments online, I wanted to make sure. Are there 2 updraft and 2 downdraft, or what configuration are they? I would appreciate feedback from anyone who might know, or from someone who has replaced them on a 98-00 model.
Thanks in advance to all you LS experts out there in CL land.
Last edited by kyk007; 03-21-15 at 11:52 AM.
#2
I'd look here for parts.. yes 4 is correct two upstream left and right; two downstream left and right.
http://www.rockauto.com/catalog/more...id=437&jpid=18
http://www.rockauto.com/catalog/more...id=437&jpid=19
http://www.rockauto.com/catalog/more...id=437&jpid=18
http://www.rockauto.com/catalog/more...id=437&jpid=19
#3
Driver
Thread Starter
I'd look here for parts.. yes 4 is correct two upstream left and right; two downstream left and right.
http://www.rockauto.com/catalog/more...id=437&jpid=18
http://www.rockauto.com/catalog/more...id=437&jpid=19
http://www.rockauto.com/catalog/more...id=437&jpid=18
http://www.rockauto.com/catalog/more...id=437&jpid=19
Legender - you the man! I was thinking of ordering from RockAuto, so you read my mind. Thanks for the clarification. Much appreciated.
#4
before replacing them, check the readings on idle, the before CAT upstream ones should fluctuate between 0 - 9 v and the after CAT downstream ones should read zero.
O2 sensors are expensive don't change them unless if required, that is why i recommend testing them before replacing!
O2 sensors are expensive don't change them unless if required, that is why i recommend testing them before replacing!
#5
Moderator
before replacing them, check the readings on idle, the before CAT upstream ones should fluctuate between 0 - 9 v and the after CAT downstream ones should read zero.
O2 sensors are expensive don't change them unless if required, that is why i recommend testing them before replacing!
O2 sensors are expensive don't change them unless if required, that is why i recommend testing them before replacing!
#6
Driver
Thread Starter
Qewani & Yamae: thank you for your words of wisdom. I will go ahead and get the oxygen sensors tested just to make sure. Yamae, appreciate the clarification on the range of volt readings to look for.
#7
Its real easy to check on an OBD2 car, with a scan tool/ code reader that reads real time info. And it would not make sense to change them if they are okay. If you can get a good deal on new ones and you plan on keeping the car like forever, then buy the new ones as spare parts you will need them at some point in the future.
Trending Topics
#8
Driver
Thread Starter
Its real easy to check on an OBD2 car, with a scan tool/ code reader that reads real time info. And it would not make sense to change them if they are okay. If you can get a good deal on new ones and you plan on keeping the car like forever, then buy the new ones as spare parts you will need them at some point in the future.
Thread
Thread Starter
Forum
Replies
Last Post
OMAHA
LS - 1st and 2nd Gen (1990-2000)
20
09-18-18 08:14 AM
akswagga
LS - 1st and 2nd Gen (1990-2000)
11
06-06-15 08:47 PM
Johntee540
LS460 / 430 / 400 / 600h Classifieds
5
12-03-09 09:40 AM