Anybody run into this problem P0171 its "Fuel Injection system too lean (bank1)", i asked around and i got possible problems such as
1. Fuel regulator
2. Oxygen sensonr
3. Fuel injectors not clean

Any other possible problems that u guys know about or expirienced with this code?

 

just about everytime i have seen this code, it has turned out to be the maf. its either P0171 or P0174 for the opposing bank. i have never received it, just passing along what i have seen as a typical result around here.

 

But if its MAF doest the RPM die at about 3,500 mine feels like it cuts of at about 4,500 RPM-5,000 RPM range

 

Its a MAF...I had P0171 and P0174...both banks lean, due to the faulty MAF.

 

I got P0172 and P0175.. would that be MAF as well?

 

My MAF just blew this morning. I need to order a new one. Anyone know where I should get it from? Someone mentioned Dave at Town North Nissan before, anyone have his contact info?

 

1-888-254-6060 Dave B

 

If your 2K Max is throwing a code P0171 and is also experiencing rough idle or stalling at startup for the 1st minute or so, it's definetly the MAF. With this failure mode, the MAF is on its way out, but not gone yet. This happened to me at 80K mi and the engine still rev'd above 3500 RPM and drove fine within two minutes of a cold start.

 

Yup, it's the MAF. I had the exact same problem and fixed it with a new MAF from DaveB. Runs like a champ now and no more stalling at startup.

 

YES I have the SAME EXACT problem as you P0171 code and power dies between 4500-5000 RPMS. I am gonna have a shop look at the car and diagnose the problem, if I find out what it is I will tell you. Stay in touch!! BTW i will probably fix the problem myself so I will tell you how to do it if it is complicated.

 

oh and also on cold starts, it is hard to get smooth acceleration....very jumpy

 

Yep same exact symptoms on my car, starting in cold weather is hard as hell, I have changed the ignition coils in the past like 5,000 miles ago (they give me no problem) Any ideas how much is a new MAF? cause obvioiusly i will change it myself lol ( no big deal )

 

Wus up guys, I finally fixed my problem IT was the MAF sensor, it runs like a brand new maxima and there was no need to reset or upgrade the ECU
Thanx a lot for your replies it realy helped me solve the problem

 

good to hear. i hope you got a good deal on the replacement.

 

Yep I got it for 82$ + shipping from Dave B.
Great deal, I recomend him for any parts