Thank you very much for the reply.
What I did!
Disconnect the ECT coupler, the three pins are there solid, no rust. Turn the key on and view the coolant data on the scan tool, the value is -40F. I try to sandpaper the three pins and spray the WD-40 on both the pins and the coupler. Erase the code in the scan tool and start the car. The engine runs smoothly. Leave it that way at the moment to see what happen next???
What I did!
Disconnect the ECT coupler, the three pins are there solid, no rust. Turn the key on and view the coolant data on the scan tool, the value is -40F. I try to sandpaper the three pins and spray the WD-40 on both the pins and the coupler. Erase the code in the scan tool and start the car. The engine runs smoothly. Leave it that way at the moment to see what happen next???