ISX Codes 2346 Turbo Intake Temp and 6725 Intake Manifold Pressure

[OakleyRiver]

Thank you to those that helped. I believe we have found the problem. I did finish up the EGR tune up by replacing Delta P sensor and Exhaust back pressure, also double checked to make sure the tube was cleaned, it was. Test drove truck for 30 miles and did not get a code to come back but did notice turbo speed seemed to be bouncing around more that I think it should. After idling for a minute I noticed turbo speed was bouncing from 4,500 to 14,000 RPM. VGT commanded was changing by only a percent or two along with this. Decided to replace speed sensor and try again. Now turbo speed at idle is 19,330 to 19,750 RPM. I'm going to assume this was the issue and send the truck back out. Thanks for the help! Hope this helps someone else along the way.