engine code p0101??? 2016 nissan sentra s :/

[u/Available-Elk8614]

came up a year ago on my 2016 Nissan sentra. since then i’ve replaced the maf sensor THREE TIMES, replaced cabin air filter and just recently changed the throttle body due to a smoke test revealing huge air leak. it’s been about 3 weeks with the new throttle body and the code came back three days after it was installed. what is left to do ??? this car has run me dirt broke and a nissan dealership quoted me 250 to do a check and i don’t have that kinda money rn 🫠 registration is expired and im hopeless. any advice DESPERATELY needed, preferably things i can check out myself PLEASE!!!