My mechanic saids the problem is the mass airflow sensor the rpm bounce

What is your question?

I clean the throttle body and mass air sensor due to codes po5507 and po102 but when I started car the rpm bounce up and down I did the re-train mode but no luck I took it to a local shop and they saids is my mass airflow sensor has a wiring problem and it cost to fix $500.00 I work on cars but not good with electric stuff