Gazzuzz, Nurey, Tpound and other engineers I can't remember please help me..... I complained some months ago that my Nissan Sunny ex Saloon 2004 model was having some issues which made me to change some sensors like Tps, Maf, can't remember the third one though, which after replacement of these 3 car drives well, I didn't drive again till 2 weeks later, only for check engine to pop up again, I managed to drive home, after 3 weeks of not driving the car, I decided to take it out yesterday only for the car to stall whenever I tried to engage the gear when returning from my journey which was not up to 5km from my house.
Now, it not moving at all and my mechanic has scanned it, the code he got was P0100 Mass Airflow Sensor Circuit, this is a thing I just bought, have not driven even 30km. Please what can I do? I sent money for another mass airflow sensor to him already but I need your advise my ogas.

Have an electrician check the WIRING for continuity and the ECM too.