Fixing your EGR/DPF Problems...

[KW660_16]

yes I tried to line them up by marking them before but the SCR outlet pipe going to the tail pipe would just not seal(maybe its bc I lost the bolts for that flange that connects tail pipe to SCR outlet pipe idk)? obviously I removed all the sensors from the DPF and they seemed fine. when you go to replace diff press sensor does that whole thing come off bc that whole thing looked new when I took it off even though I have 690K miles on it. Do you need to remove/maintenance anything on the SCR system periodically? One last question: where is the pressure sensor before the turbo you are supposed to inspect/clean on the engine? any other sensors on the engine I should look at (I already replaced NOX sensors(both)).