Help identify this part and hose please

Please id this part and hose. It is located under the vehicle next to the differential that is next to transmission

 

Would that cause a p0441 evap leak code?

 

No. P0441 is a pretty broad code. Start with the gas cap....

 

Already did that and the purge valve and switch valve. Finally found the ventilation hose from air cleaner to pcv inlet was cracked at the pcv. I was just under the truck to see if there were any other vacuum lines busted and found that. Wasn’t sure what that hose was so thanks for the id. Parts get here tomorrow so hoping that’s all of my issues

 

Have you chased the lines in and out of the evap canister?