Having a cooling issue. Cooling system is stock as well as the rest of the engine so I dont think it should be running so hot. It runs at the O in the NORMAL range on the temp gauge no matter if I am going 80 or I am sitting in traffic. Today I burped the coolant system and replaced the temp gauge sending unit and it has not changed. Also something weird happened when I replaced the sending unit. I first disconnected positive termy then the sending unit and I had to also disconnect the TFI module in order to remove the sending unit. After I put everything back together and started back up I now get a CEL. Never had one before. Any thoughts on what is going on?