I'm not sure what you are using to test with but 200F is 93C.
So if you are using an ADX file coolant may well be read in Celsius for that sensor in this instance.
Note: that a lot of ADX files are set to read both F & C via a lookup table, you may have associated with the wrong parameter.
From what you have said there is a good chance you have one reading in F and the other in C

MOC