Hi Everyone, My name is Bill and I am from Fort Ashby WV. Thanks for all your posts

I would like to know where I can find the codes and what each one are that my 8.3 ISC Cummins give to me on a self test. I had a fuel line get a hole in it so I replaced just the fuel line (return to fuel tank)  after I replaced it and got the air out of the system it fired right up but I have a check engine yellow light that is illuminated.  Could that be that I still have air in my fuel line? I am gong to self test it in the morning but if I get a code I will not know what it means unless somebody can guide me to it.  Thanks to all of you for taking the time to post all that you have already posted!