Gryphon says Differential Pressure Feed back sensor off or blocked.

Don't know what I did to cause this one. Had to clean up the aftermath of a transmission line break under the front of the truck, and cleaned up the engine bay while I was at it. My time is very limited for the near future, so I'm hoping this will be a relatively easy fix. Where is this sensor, anyway??

 

Nevermind..... got it. DPFE small hose was off

 

Dang, Red - y'all beat me to it!

 

Google Fast never actually knew what DPFE stood for.... kudos to mr gryphon