P2185 = engine coolant temperature sensor #2 high voltage.
That sensor is in the lower tank of the radiator (#10 in the picture). Earlier (2003-2004??) that was a fan switch, but by 2006 that's an actual sensor wired to the ECU.
Dont forget to check for crossed wires or bad connections. But normally that would cause LOW reading, not high.
Not sure what you could damage, but I suspect it's mostly for radiator fan control. Beware of sitting & idling. Otherwise, when the car is actually moving there's plenty of air pushed through the radiator. But keep an eye on the temperature gauge.