Well f**k me… I traced and removed the roof module and then removed the weird tape the previous guys had put around the lines leading up to it, to my surprise though, no cuts or mods made there, anyways, while I had the module out, might as well clean the contacts with some Crc spray..
So did that left to dry for 25 mins and then plugged it all back in..
Temp sensor code GONE!!!!
Hell yeah!!!!
Onwards and upwards
(I wonder if hotwiring the pump motor did anything like maybe it was stuck?) or maybe it was just dirty connection?)