[Sir 500mph]

Thats for your EVAP system. Replace it, Do Not JBWeld. Somebody more informed than me can tell you exactly what it is.
See those 2 hoses? They pull a vacuum through that box. Thats your code. You dont want to risk JB Weld particles making it into that, trust me.

 

[Sir 500mph]

That is even worse. Take your vehicle to a reputable mechanic. That is the only advice I can give you for the prolonged life of your vehicle.