Mine was clogged (though I think I am having another leak on top of it). It took me a little while to find it so I thought I would add a picture of where it is here in case anyone else is looking for it:
Here it is under the car. It is located behind the front suspension in the exhaust tunnel. If you find the catalytic converter, it is right near that on the passenger side of the tunnel.
And here it is when looking at the inside of the car:
And from the outside, if you follow the two blue arrows to where they intersect underneath the car:
Here it is under the car. It is located behind the front suspension in the exhaust tunnel. If you find the catalytic converter, it is right near that on the passenger side of the tunnel.

And here it is when looking at the inside of the car:

And from the outside, if you follow the two blue arrows to where they intersect underneath the car:

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