D13 def pump assembly

getting some funny codes off the engine for the last two days. SPN (3363) points to def. FMI (2) maybe heater, maybe pump or pressure. Not activating vehicle message and truck is running fine.

Assuming it makes it to this weekend I wanna go ahead and pull it apart. Clean the filters/screens. Check out the connectors and pins and make sure it's not just something small before I look at replacing something expensive.


Never pulled any def system apart- if anyone has pointers especially for the D13 lemee know please.


Luckily no fairings or skirts on the truck so no pulling a bunch of ######## off just to work on it.