Hello Scotty.

First, I would like to let you know that I have been watching your YouTube videos for many years and have learned a lot, thank you for that. I finally decided to become a member because a check engine light keeps coming back up no matter what I do and is kicking my behind. 

I have a 2015 Nissan Sentra SV 1.8L. I bought the vehicle with a transmission slipping problem from a private seller in Facebook marketplace. I ended up buying a new transmission and installed it, the vehicle runs great and I do not notice any drivability issues, but the MAF sensor code keeps coming back.

I have done the following in the attempt to fix the issue:

*I have checked for Ohms between the four wires from the MAF to the computer plug and all the 4 wires read 0.04 Ohms 

*Cleaned the throttle body and reprogramed the ECM as well as the TCM because why not I already have a new transmission in it.  

*I found out the alternator was only putting out 12-13 volts and sometimes it used to stay at 12. something, so I decided to change it out which was a pain. with the new alternator is reading 14.2 and goes down a little but goes back up to 14.

* I changed the throttle and the check engine light didn't come back up for about a week, I thought it was fixed and the beast came back on.

* I attempted to clean the MAF sensor

*I have also swapped batteries

The mile on the vehicle is 167,000 I was thinking of doing a compression test and checking the exhaust if it's clogged. Maybe I should have done that first, but the vehicle had no drivability issues. I hope maybe you can point me in the right direction. Thank you very much.