Maf 22680 2y001 for 2003 qx4

[351cleveland]

So after doing my spark plugs and having to move part of my air intake tube in the process, my qx4 has been running a little rich it seems as i was smelling a little bit of a gas smell through the vents while on economy setting, or any other setting besides the "auto." In the engine compartment i could smell it too. I also seem to be suffering from the loss of power and seemingly little miss-fires. No real fouling or backfires per say, but definately noticeable at times. But then every once in a while it seems to run better, but still no where near the performance for the first few months i owned my q. It just kit bout 123k miles. After doing research, narrowed it down to it hopefully being my maf sensor. Just recieved the cheaper maxima 22680 2y001 maf, and wanted to know what to do with the extra pin on the left. Mine has only 4-pins, and this one has 5-pins. If anyone has had this same problem and has the solution, please help advise as what to do with the extra pin (pull it, etc?)

[ml21]

Is your ses light on with a code for the maf?

[351cleveland]

No. No ses or codes.

[351cleveland]

Edit. The extra pin on the top of the new maf is on the right if your facing the engine. The stock connector has 4-pins and the fifth one on the right has a plastic plug. Do I just take put the plug, or remove the metal connector pin? Someone please chime in if they have soom good advice.

[CanuckQx4]

I dont know if this is "good: advise, but I just bought a new MAF with the same part number you listed. But mine was completely drop in, no pin mods or connection mods needed, plugged in perfect to the factory harness.

This is the auction I won
http://cgi.ebay.ca/ws/eBayISAPI.dll?Vie ... 0498217353

Does your MAF have the part number listed on the side of it?? I dont know if youve verified you got the right part

I "believe" the vg33 engine have a 5 pin MAF sensor connector

[351cleveland]

That's because you have 2001. I have a 2003 which apparently has a little bit different maf sensor plug. 4-pin with the 5th far right pin connector being blocked with a plastic plug. So anyone with I believe 2002-2004 pathy or qx4, who has used this maf sensor please chime in. Thanks:)

[351cleveland]

So after doing a little bit of research on some other forums, sounds like people have tried this sensor on their 2002 and 2003 maximas. Someone on i believe the maxima.org site, said that you had to remove the IAT thermistor from the old existing maf, to the new 22680 2y001 maf sensor. So my question to anyone on this forum, is out of the 4-pins on my existing maf, which one or ones are the IAT thermistor so i can move it over to the new 5-pin maf. The person said that you don't neccesarrily need to swap this pin and it will still perform well, but will throw a code for the thermistor malfunction or something. So basically i need a picture showing the IAT thermistor, or a good description of which one it is and how to move it over. I dont do things half-assed, so i will wait till i have this information. Thanks in advance to anyone who could help solve my issue.

[asnorton44]

From what I have read it clips onto the MAF.

[351cleveland]

So where does it clip onto the new maf? Do I have to open up the tube and atach it to the actual sensor, or from up top where the pins come out where the harness connects onto it?

[asnorton44]

I would just install the new sensor only and use your old tube.

[351cleveland]

Thnksfor the advice. So what do it do about the 5th pin on the far right comingout the top of the new maf, considering the wiring harness only has 4wires going thru it and the 5th far right hole being plugged with a plastic tube thing? Or are those pins part of the tube and not the actual sensor inside of it? Are there pins facing the other direction towards the inside of the tube where the sensor plugs into it?

[351cleveland]

Bump to the top! Still waiting for accurate input.

[asnorton44]

Can you take pics?

[ml21]

the pins are apart of the actual mf assembly not the tube so disregard the last comment aout the tube now ive neber done this conversion befor but i have hear and seen that the guys that do it reuse their old thermistor. As far as wiring goes i dont kno the set up sorry to say but you cand basicaly match it up to the old one just by looking at the i would guess to sum what point you out in the right direction

[351cleveland]

Pic of the iat thermistor please:) that would be a huge help!

[351cleveland]

Seen on maxima.org where guys have been doing this swap on their 02 maximas, but they showed their existing maf with the IAT thermistor attached to it and it was a simple swap with just crimping and/or soldering into place onto the new 22680 2y001 maf sensor. Looked simple enough, although when i take just the maf sensor out of my existing tube, it does not have the iat thermistor attached to it, nor looked like there ever was one on there to begin with. Also, the 02 maxima existing maf the guy pictured had 5-pins coming out of the top, where as i have only 4-pins coming out. Really confused at this point, and will be taking out the entire maf unit tube from my ride tomorrow when its light out. I'm almost wondering if their is still yet another completely different maf between 01's, 02's and 03's? One specific Maf for each. Or if the previous owner switched out the stock with one from the junkyard, or did a similar aftermarket swap as i am attempting, but using a maf that has the IAT thermistor attached somewhere else. Hoping to gain some more insight tomorrow.

[351cleveland]

Well after doing some more research, looking at the fsm's between all three years pathy's and qx4's(01,02,03), i realized that they all have the iat thermistor on a seperate sensor more upstream, actually behind the left fog light mounted onto the intake resonator white thingy. I decided to finally just replace with the new one and plug it in. It actually plugged right in surprisingly enough, even with the descrepency between the 5-pins coming out the top of the new maf, and the 4-wire harness plug. And WA-LA! Works like a charm! Went out and took a quick 10-min test drive, and no issues what so ever. Felt more responsive, and even almost floored it to 5500 rpms before shift. Sounded beefy, especially with my new dual exhaust set-up. Still hearing a little lifter noise, so hoping after i do the power-valve screws and throttle body/intake manifold cleaning, i will be running top-notch. Thanks for everyones help on this forum.

[CanuckQx4]

no check engine light for you whatsoever eh??

Did you notice a size difference between the 2 sensors?? Im going through some problems using the same part number MAF you used, but in my 01

[351cleveland]

Yes the difference in size was noticable, as well as the very end of the rectangular tip. Different shape with a hole in it. But oh well, it works great and thats all i care about! I probably over thought it all, but wanted to be safe than sorry. Especially since this is my dd for the moment. the main thing that stumped me was the difference between the 4-pin and new 5-pin set-up. Still curious why they are different. I think the iat thermistor threw me off also, but after looking at the fsm, i noticed it was a seperate sensor, and the maximas dont have that on their rides, and thats why they had to remove the iat thermistor, and add it to the 22680 2y001 maf sensor. Problem fixed, im happy:)

[CanuckQx4]

and no codes on first startup??

I wish I was that lucky

[Pwnin O'Brien]

Here's a little background about the 2003 QX4/Pathfinder. The QX4/Pathfinders utilize an Intake Air Temperature sensor which resides in the intake "bladder" behind the driver side fog lamp. This sensor essentially tells the ECU the temperature of the air about to enter the engine so it can adjust accordingly. The Maximas also utilize the same IAT sensor, however their sensor resided on the intake tube itself. In 2003 Nissan decided to relocate the IAT sensor on the Pathfinders/QX4s, they removed the old IAT sensor and they decided to integrate the sensor with the MAF sensor, making an "all-in-one" unit. The new MAF would measure the air flow and the air temperature and send that data to the ECU. Now, many Pathfinder/QX4 owners have completed some sort of modification to their intake system, whether it be remove the bladder or replace the entire system with a cold air induction system. Most (if not all) remove the IAT sensor since it was attached to the white intake "bladder." Some have had issues with the vehicle running sluggish or idling funny since. My recommendation was to locate the IAT sensor as close to the intake as possible, thus giving a somewhat accurate reading as to the intake air temperature.

The 22680-2Y001 is meant for the 04/2000 - 06/2001 Maximas, those vehicle utilized the separate IAT sensor. Your 2003 QX4 came from the factory with the integrated all-in-one MAF and IAT sensor. Now, for some reason the ECU does not throw a code for the IAT sensor once it is disconnected, I'm not sure why. However, the engine can still run roughly with that sensor disconnected. I'm not saying that you should immediately replace your new Maxima MAF with one from a QX4, I'm just saying that this is something you should consider.

[351cleveland]

Thanks for the history lesson. Unfortunately your statement has some inaccuracies. My qx4 IS a 2003 model, and still has the seperate IAT sensor in the "bladder" as you call it, and mounted to it. Now if my existing 22680 4w001 original maf, did not have the so called all in one iat/maf sensor, such as the maximas displayed on maxima.org had. So i figured after looking through our fsm's on this site, that they all showed the iat sensor seperate mounted to the bladder of the intake system. The 2001 and 2002's showed a 4-pin connection on top of their maf's. The 2003's acually showed the 5-pin connection comming out of the top of the maf sensor, but i still only had the 4-pin setup on mine. Hmmmm still confused on that one. But after looking throuhg everything, i concluded that it was safe enough to atleast give it a try with the new maf. Took a 10-min test drive immediately after installation, and their was absolutely no issues or codes thrown, and i definately noticed the difference i was hoping for. The shifting smoothed out, and when i heard and saw my rpms go up, the truck responded more responsively. I am happy for the moment, and will give more input after some more extended driving this week. Thanks pwnin for your input though.I do find it very useful, and informational.

[351cleveland]

edit,"now if my existing 22680 4w001 original maf did have the so called all in one iat/maf sensor, such as the maximas displayed on the maxima.org site had", i would have surely removed the existing iat thermistor, and re-attached it to the new 00-01 maxima maf. But since i didnt, there was no need to.

[Pwnin O'Brien]

I apologize, I am mistaken. It looks as though they didn't carry over the new MAF sensor from the Pathfinder to the QX4 for the 2003 model year. I thought I had read that they were the same, but after checking the '03 FSM you are correct, they still utilize the separate IAT sensor in the QX4.