Here is the service bulletin that lets you know about the software update and what codes it adds in. If these codes are present when the concern happens then the only way to fix it is to solve the excessive return flow problem. The excessive return flow can be caused by injectors or a failed limiting valve. In order to fix it you must perform a return flow test to see where the excess fuel is coming from.
Here is the service bulletin -----> click here
There is one thing that you can try in case it is just a loose connector tube, try to retorque all injector connector tube fasteners. If it is caused by a loose connector tube, retorquing the fasteners will solve the issue.
Click to view connector tubes.
You stated the fuel filter was dirty, was it black? Was there any water in the bottom of the fuel filter housing?
You asked "If I don't fix or replace will i blow the motor. Will it break the trany. Why are there no hard codes."
If the injectors are worn out and causing the problem, it IS DEFINITELY possible to burn up the engine if one happens to stick. A stuck open injector will cook an engine VERY quickly so I HIGHLY recommend replacing the injectors if that happens to be the failure...
if you want to perform the injector return flow test yourself, you will need some special tools to properly separate the return flow from the injection pump and limiting valve to isolate the return flow for accurate testing. Click here to view special tools.
If you can obtain these tools and need the procedures, let me know, I'll round them up for you..
Keep me posted and let me know if you have any additional questions...