"Can a low B12 cause Neropathy"
Yes, low B12 is can be associated with neuropathy, nerve damage.
"what is the B12 high and low range?"
My lab normal values are 200 - 900 pg/mL [picograms per milliliter].
Bear in mind normal ranges may and will vary among different laboratories. Talk to your doctor about what your specific test results and pay attention to borderline readings.
If I remember correctly when I had B12 tested my doc also checked my ferritin and folate levels. Can't remember the reason why but it was something like they go hand-in-hand. Best of health to you.