Quote Originally Posted by mina_nuka View Post
As per your writeup, the engine is obviously not overheating. It is the overheat warning light that you are concerned with. Depending where your car was manufactured, the THW or CTS or the coolant temperature sensor feeds this information to the ECM and is forwarded to the body control computer or BCM and is given off as a signal to the IPC or instrument panel cluster.
Your car might have inter-computer communication problem or your CTS is giving wrong signals. Have your car scanned for communication or U codes. What you are doing is way too far from the possible cause. You might even have IPC problems. Be very careful of mickey mouse trouble code readers and dongles.
bro ano yun ICS? CTS?

thanks