So we know TPS is ok, not convinced it would be CTS seen as this is used to determine the base level of fuel injected from freezing to boiling and so you would probably notice driving problems with it. It works on same 5V principle as TPS so you could measure the output of this, be careful when testing as the outputs are not linear, but you need to know temp to output for this sensor which I am sure will be on here.

Martin