I have Turner pro RT connected to my 1995 GMC truck 5.7. On my dash board and data list it shows under temperature, Engine temp, Coolant temp and manifold temp. On my data and it shows my engine temp in black as 212 and my coolant temp in red 100.3 If I unplug my temp sender for computer it shows both going to -40, showing me they are reading from the same sensor. My question is why are there 2 readings and reading different and why is 1 black (OK) and the other is red (bad). I hook up my Verus it shows the coolant temp 212. Any help would be great. Thanks