Where is the 2008 FORD F-350 SUPER DUTY EGR Valve Temperature Sensor located? on 2008 Ford F-350 Super Duty

I get the code P040D every so often. According to all of my research, this is the problem. I have the sensor, and any thing I find about location just talks about how hard it is to replace, but it does not give an exact location.

Asked by for the 2008 Ford F-350 Super Duty