2002 Monte Carlo SS Jerking @ 45 Mph

2002 SS 3.8 v6 over drive trans 115,000 Miles , Jerking at 40 to 50 mph not all the time , Test drove car with scanner on it , found the mass air flow sensor dropping out to zero , Checked for bad wires . Had the code in computer but no check eng light. Tryed cleaning sensor no luck . Replaced it with new runs great , Cleared the code test drove runs great , Hope this help ...