SCR Question

[JimT]

Oh boy.

Let's just say if you've made it 200,000 mi without any major engine problems you are lucky.

Yes, the SCR can needs to be empty. It is basically the same inside as the DOC and DPF. If left intact it will eventually clog up as you seem to be experiencing. Unfortunately most need to be cut open and welded shut afterward. You could replace it with straight pipes, but it will no longer appear stock.

That is only half your problem. The other half is the program in your ECM. If you've made it this far it might not be horrible, but the fact that the SCR wasn't addressed is proof enough that the person probably got some stuff wrong.

If you don't have it already get a Windows laptop and a copy of Insite and pull a copy of the program from your ECM and send it to someone on here to look at.