I have a 2003 Camry that is overheating. The overflow tank bubbled over. The radiator fan did not turn on even when the ac is turned on. The temp gauge rises past the middle mark. I am wondering if it is the coolant temp sensor. If it is does anyone know where this is located?

Thank You

 

What engine model?

When does the engine over heat, hwy speeds, stop and go, etc?