What does p203f mean in a 2013 Ram 3500 SLT Cummins 6.7L and how do I fix it?

Question

The check engine light came on in my 2013 Ram 3500 with the Cummins 6.7. After running a scan several codes are active and I don't know how to fix them. The first code is P203f. The second code is U110E. The third is P0868.

Answer 1

if you are under warranty the dealer will fix it at no cost, U110E is related to a communication error for a few seconds, if it has been cold and or rained it could have caused the issue from what I read or if you washed your truck.

p203f is related to the injectors, you need to do an injector flow test. That means the def injector will need to be removed and placed in a dosing cup. Then run the def test with the ford ids computer to see if the injector is flowing correctly.

or reset all the codes and see if they come back