ABS pickup to reluctor ring gap setting on the L2 onwards model is from 0.25mm to 1.65mm.so quite tolerant on the gap then.
I used to fit magnetic pick ups a lot on new engines when I was at w***.The biggest problem was metallic particles on the MPU head as it has a slight magnetic field when running, and starter rings chuck off all sorts of bits of metal when they are running.So just check the gap, whip out the pick up and make sure the face and reluctor ring are clean, with no bits of metal across the gaps etc.plus make sure the ring hasn’t been damaged/bent etc.