You don't need to remove it to test it, If ambient temp is a certain value and your resistance is not in spec, it fails. If you can't ohm out a 2 pin sensor you really shouldn't be working on your car in the first place.

I am not saying you need to be a tech to fix your car but you need to test before replacement.

If your every in Kitchener come by for a beer I would love to meet another DSM'er you could probably teach me lots of things.