Airbag/ SRS/ code 41 RH sensor issue

I am getting the blinking airbag 41 code. I located the sensor & visually I looks fine. I think I traced the lead wire to where it is plugged into the harness- it is vertical and on a support to the right of the radiator.
I was able to unplug it(if I am correct) and there was no corrosion found. Used a bit of spray cleaner any way and plugged back in several imes. Still blinks 41. Is the sensor module itself subject to internal corrosion and can it be removed and serviced, or is it a replace it only deal? I can get one new for @ $40.
If Repr or Repl sensor do not solve the issue where do I find the Airbag diagnostic module? Thanks for any help.