95 ecu in a 97
 

I got a early 95 ecu in a 97 and I get a p0136 code o2 sensor bank 1 sensor 2. Anyone know how to get rid of that code? This is the sensor in the cat for 95-96 and after the cat 97-98 as they are different sensors.

There are a couple threads on the fix, re wiring a pin or two and/or installing the 95/96 sensor. I think its mentioned in more detail in some of the 95 ECU swap threads.

Do you have any links to those threads because I searched and came up with nothing.

Sure. The search terms are too short to effectively use on here, so I used this on Google: "95 ecu swap rear o2 site:forums.maxima.org"

http://forums.maxima.org/4th-generat...p-success.html
http://forums.maxima.org/4th-generat...onnectors.html

http://forums.maxima.org/4th-generat...-5sp-swap.html

So switching the pins will allow me to keep my existing rear o2 sensor? Or what about if I swap out the whole engine harness for a 95 harness will I still need to switch the pins for that rear o2 sensor?

It should, yes. But I have not personally tried it yet. I plan to in the next few weeks when I install my 95 ECU.

Swapping out the harness for a single pin is just plain silly.

Why is it silly to swap out the harness? It's not like it's hard and why not do if i have the harness for the ecu

I suppose it would be "cleaner" to use the harness but simply swapping a pin would be easier by far - its a 5 minute job compared to a few hour affair.

Few hour affair lol not for me but i just want to know about the rear sensor if i can keep it or not after the pin switch or harness swap

I believe you can keep the sensor, which is why you would need to swap that pin anyways. The different ECU years have very minor differences in placement of specific pins and (if i remember correctly) the rear o2 sensor is one of them. Im going to be swapping a 95' ecu into my 99' next month once the current semester ends so i've been trying to read up fully on this stuff.

Im on my phone but later ill try and dig up some relevant threads i have bookmarked on my computer and edit this post.

^ links are on post #4.

If anyone is interested, I have a PDF file that has the pin connections and circuit name for all the years of the 4th gen. When a pin connection is not the same on all the years, that pin number is highlighted.

Unless someone can tell me how I can post a PDF file here on the org, pm me with your e-mail address and I'll send it to you.

^^^^ Dennis sent this to me over a year ago... With that PDF and Whilmi's (spelling) write up, this ECU swap should be easy. As far as avoiding the CEL... click on the links that appear in the listed threads for more info.

Someone let me know if you can read these.
I want to help get away from the PDF to make it easier for the org.

Attachment 24370

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..and thanks again Dennis!
:)

The pin layout should be the same for you I did this on my '98 with a '96 TS ECU. You need to relocate pin 107 to pin 105 and then ground pin 112 since the ECU requires a separate ground signal for the rear O2 sensor. You can tap any ground wire on the harness for that.

OK the ground issue for the rear o2 is an easy fix for using a 95 ECU in a 97..

Did they make any 95 Cali spec ?

I'm a 97 Cali spec auto looking to use a 95 Auto Fed specs. Would their be any issues besides the rear o2 with the swap?

@max, where r u in nj ?

im closeby in bayonne

Yes they do make 95 cali spec ecu and you want the early 95 ecu through 5/94 production date federal spec because it has less emissions parts on it and yes the rear o2 sensor will be the only code you will get which you will have to switch the pin then ground it as there is a link in this thread on how to do this

OK thanks.. how would I know the production date of the ECU..

You know where I can find part number for it? I searched but head people mention early production 95 but no one listed a part number from what I can remember.

theres a pdf list of nissan ecu's with prod. dates, search it, its here.

Can you find this and post it herei would like to see this

Would be nice.. since its on topic. :)

Sure sir, enjoy....

http://jimwolftechnology.com/wolfpdf/ecu-id.pdf

Granted, it doesnt have the prod dates, i thought it did, but the first ones for the 95 year may be the earlier ones possibly.

Yea it seems the first few 95 ecu part numbers may have been the first produced looking at how JWT laid it out. thanks for the link.

YW. The Wizard pointed it out to us in a different thread, greast list for sure.

Just what i needed..i have the ecu to swap as well...thx

Any chance you can take some pics and post a step by step, it would be invaluable and i might be able to chip in a small donation for your effort :D

https://maxima.org/showthread.php?t=599341&styleid=6
^Some good info there.
As soon as photobucket is done with their online maintenance I'll post the differences between the pins and years.

Thanks, i have seen that thread in the past, will look at it with fresh eyes on the weekend.

Attachment 23132 Attachment 23133 Attachment 23134

Yellow highlights are the differences/changes.

Ok has anyone done this mod successfully?

Yes, you were already told yes, and you were given the info to go where others have gone before. Go do.

:sprint:

Well I did the swap and I still get the code unless my sensor is bad and I got the sensor last year brand new and I even swapped out to a 95 harness and still get the code....and nobody has said yes I've done this modification people just say what to do and that's not saying they have done it themselves

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Attachment 22102

Please don't post something that's not going to help. I'm here trying to resolve my o2 sensor code and this doesn't help

You've been helped.

Now we are all running around tryin to figure out what you did wrong when you claim you did everything right.

Obviously you misread something.

That gif was helpful to any other org'er viewing to see that this thread should be done IMHO.

When all else fails, start over.

Your still not helping with your smart remark and nobody is running around trying to figure out anything and I did everything as it was posted and I still get the code slick....now I want to see if someone is having the same issue as me before I buy a new sensor now if your not going to help then DON'T POST