Off compared to what, you Haltech sensor? Where is that and how do you know it is accurate? Just playing Devil's advocate as different sensors in different locations are surely going to read differently.

haltech sensor is new and makes more sense in reading as opposed to prosport. and it was literally right above prosport sender.

My apologies, my Prosport temp sender DOES NOT thread into the OEM rear iron location. Again my apologies for the misinformation. I have no clue why I thought I remembered that???