Hey guys I'm new to the group but I have recently purchased a 2007 f250 power stroke I had all the fluids and filters changed, everything good I towed my 9000 lb travel trailer about 1000 miles and now I have 3 codes for egr. Any advise?

 

Is the EGR installed?

 

The guy I bought it from said he thinks it has a delete but idk how to tell