It’s not too hateful. Take your time. But what I don’t understand is if it’s bad the oil pressure won’t work either. You could check to see if you’re getting approximately five volts at the sending units for temp etc. it could be pins loose on printed circuit board or even bad traces etc on the board. Also could need better grounding of the instrument cluster housing.
If you are sure the oil press gauge is fed off of it then I will troubleshoot the items you mention. thanks again for your time and support. I will update when I find the smoking gun. thanks again