yeah maxes out and cant read much after a certain reading. "can" cause issues.
e.g.
I had my high flow turbo fitted with standard AFM. I was told to keep boost down because of the AFM maxing out. On the powerFC I wasnt spose to go over 5000 with the air volume read out (forget the correct term?) cause if I did, and if boost spiked a bit, good bye motor.
Got the z32AFM on, now it cannt got over 5000 - most I have had on the track with air flow was like 4600
much safer
Hope that kinda explains why, id it doesnt, I fail!