Low mileage 2011 f750 Cummins 6.7

[Skizzlez]

Quick update:
Getting truck back from service center today -- they replaced the SCR under a campaign.

I asked the tech to look at the urea doser, because of the crystallized DEF hanging from it. He called me this morning to let me know I should replace the doser, because it is all caked up and corroding at the tip. He suspects it is leaking, causing the 3574 low pressure code. Which was what I was thinking too..

He wanted $500 to swap the valve, but being that it is only 10 miles from my own shop, i'm just going to do it myself -- the parts can be had for $150 i've seen. Anyone used one of the aftermarket brands that hang out on Ebay/Amazon? I'd imagine they are just serviced bosch units, but they are only $40.. thoughts? Doser Part number is 2888173 -- just for reference.

Hoping this solves the low pressure code.

Next job is to service the EGR system =)

Thanks,
Jason