nissan read the codes,
even they said its like 3-4 of them
mass air flow
throttle bodies
some minor ones from engine.

they said if you want all the code areas changed, its gonna be 4-5k. im like that is a set of new pss, nice rims, and other upgrades.
i kind of just want to change whats causing the light to come on, not spend a fortune on things that are not eveb going to get the light off

If you will pull the codes yourself and post them here, odds are that someone will be able to help.

I don't know why this is bringing back memories but, I had an 06 Sentra Spec-V that threw a code at 20k miles and went into limp mode. Dealer said it was the throttle position sensor or something along those lines. They replaced under warranty and all was good until 600-700 miles later when it happened again. My remedy, I went to the store and bought some purple power, and used that with a good power wash under the hood in the engine bay. Reset the battery and never had another "Service Engine Soon" light again, and trade it in with 93k miles on it.

Not recommending you do this, it is what worked for me on a different Nissan model.

You can buy a reader off Amazon for pretty cheap. Get the codes and post them here, I am pretty sure someone can help you.

clean your mass airflow sensors and your throttle bodies...there is a tutorial on youtube, it happened to me and my car flies now better than I can think off, time-consuming but easy to do :driving:

The OP doesn't sound like he knows much about working on a car. Probably telling him to clean MAFS is a bad idea. Best thing for you to do OP is to call a mobile mechanic and make sure he's got good reviews on Google at least. Make sure to call him while the check engine light is on not after you or anyone else has reset the ecu. Ask him for the specific codes after he diagnoses your car .We cannot stress that enough.

Cleaning the TBs and MAFs is not difficult. A local forum member might be able to help the OP :twocents:

:iagree:

Even a rank novice mechanic should be able to clean the MAFs -two easy-to-get-to small screws per MAF, remove MAF, spray with cleaner, let dry, replace. Takes about as much expertise and time as checking/topping tire pressures. More than one DIY on this site. The hardest part is getting the wiring out of the retainers to get enough slack and even that's not difficult.

I also heard if you dont wot your car will slowly detune itself to drive like a granny.

Warm up the liquids and parts and do a few wot launches ;)

Get the codes read at AutoZone for FREE and Post them here for FREE advice dude. Don't throw 4-5k at a stealership!

Advance Auto read my codes and for sure it was the MAF's/ cleaning the throttle bodies, and I did the research and there is a youtube video that covers both, I have a broken pinkie and a broken thumb, lost one of the screws somewhere in the engine abyss but found them I the Ace hardware store no problem, if I can do it with 8 fingers anyone can do it https://www.youtube.com/watch?v=85-y-QlU_-0&t=626s

Ok so I am assuming OP is going into Limp Mode. It was happening to me after I installed the Long Tube Intakes. Small particles or things like bugs can get into your Mass Air Flow Sensors and damage the small filaments inside the air flow sensors. It is recommended that you clean both sensors really good and re-install. Cleaning the throttle bodies is also a great idea. I personally had the same issue as OP and did this and the issue went away. I agree with everyone else commenting the same suggestion.

https://ibb.co/c2LLFo

The link has the photo of the codes.

So after this i bought 2 mass air flow sensors from someone on ebay from a crashed Z.
i deleted the check engine and it came back after 150 miles.
do i need to reset the ECU entirely?

Whether you reset the battery or reset codes with a reader, if there is a problem, it will still trip the code.

Ok so now you actually have codes to work off of. P0171 and p0174 so both banks are lean not just one. So things that are shared would be something to start looking at. What is fuel pressure and volumn values? Any vacuum leaks? PVC check valves. You have basically eliminated the MAFs (it's unlikely you got two more bad MAFs). So look for reasons why the car would be lean (unmetered air or can't deliver fuel demands) that would effect both banks, exhaust leaks before cats could be a cause but again the odds of having two is less common than something both banks share same for AF sensors. Now you actually need diagnostics.

So rechecked, and the code now is
P2099
Feel like selling the car now, who knows what mew code will come up if i fix this.