Auto Scanner found error code P0138 (HELP!)

[kevinq45]

I did an OBD auto scan and found the error code P0138 and it tell me something wrong with the rear 02 Sensor. The problem is I dont know which sensor to replace. Is it the LEFT sensor or the RIGHT sensor?

I hope someone know.

Thanks.

[qship96]

Replace as a pair for best results,might as well do front pair if they are original as well.Best price for OEM quality sensors is http://www.sparkplugs.com

[maxnix]

Replace as a pair for best results,might as well do front pair if they are original as well.Best price for OEM quality sensors is http://www.sparkplugs.com

But call them to verifiy part number as the web pages for the VH41DE have had incorrect numbers in the past.

Tell them you are from NICO.

[qship96]

Good point Brian.Whatever you do, They are awesome to work with,and I got my order within 2 days of placing it.Prices are un-touchable,even by Joe for the o2 sensors

[96Qowner]

While you're at it, Kevin, have them check on this TSB from Infiniti:

http://www.infinitihelp.com/Ow...8.htm

Here's a recent thread from another Y33 owner who had recurring P0138 codes:

zerothread?id=286327

[kevinq45]

Thank you, i just placed an order from sparkplug, their price is great. I will let you guys know if that does the job or not.

[RAP]

Replace as a pair for best results,might as well do front pair if they are original as well.Best price for OEM quality sensors is http://www.sparkplugs.com

Just purchased two O2 sensors for my Acura Legend from the seller indicated above. Two for less than the price of ONE ! ! ! $ 100.00 plus shipping.

The strange part: The sensors come in a package/box marked "NTK" as the manufacturer. Could this be a little piggy backing on the renowned "NGK" ? ? ?brand? Not strange really because that is a common practice in the marketing of "stuff".

Jack

[qship96]

yes,NGK sparkplugs market all their o2 sensors under the NTK brand owned by them-kind of strange to have to market 2 different brand names,but thats how they do it.

[kevinq45]

I didnt have to buy two o2 sensor, i kept on searching and i found the document and the p0138 is on the left side. I have replaced the left side and reset the o2 sensor and now just waiting to see what happen next.

my car is now 97k when it reach 100k i should due a full tune up.. What do i need to change for a full tune up?

I have a 2000 q45 anniversary, my pervious car was the 1999 jeep grand cherokee and i get like 6mpg, hate that car. Own it for like 8 months and got rid of it quickly.

[qship96]

Best to replace O2 sensors as a pair, usually when 1 goes, the other is also near the end of its useful life- all about combining the labor to save money and time {and headache and downtime}

[kevinq45]

You are right but i wouldnt replace anything thats not broken and beside i did it myself, so there is no labor cost. I use my OBD scanner to check the live data o2 sensors and they are in the right spec. So why waste money when its not broken?

[maxnix]

You are right but i wouldnt replace anything thats not broken and beside i did it myself, so there is no labor cost. I use my OBD scanner to check the live data o2 sensors and they are in the right spec. So why waste money when its not broken?

Look at and compare the duty cycle of each on a scope. Best if matched, which is why best replaced in pairs.

[qship96]

You are right but i wouldnt replace anything thats not broken and beside i did it myself, so there is no labor cost. I use my OBD scanner to check the live data o2 sensors and they are in the right spec. So why waste money when its not broken?

Makes about as much sense as replacing spark plugs one at a time as each one fails........

[bullittandy]

You are right but i wouldnt replace anything thats not broken and beside i did it myself, so there is no labor cost. I use my OBD scanner to check the live data o2 sensors and they are in the right spec. So why waste money when its not broken?

This is the correct way to make the repair, if the sensors are within specification then you can't improve upon that.

This thread is kind of weird in that we have a member who has actually investigated the problem using the correct tools AND theory, replaced what is broken and gets several responses that say you should blindly replace parts. Crazy.

The reason I replace things like that in pairs, sets etc is because I'm extremely lazy and love to waste money. So I'm not willing to investigate the problem-rather just throw money at it. Like suspension work, I replace nothing or replace it all.