Thanks for your interest in the issue.
I don't know if there is any engine code just seems too soon for second oil change, been told it should be 1400-1600kms.
Had f350 7.3 for years change oil ever 9000 kms bought the new Eco diesel only 3000 km and the oil life is till me to replace the dealer replaced it free said computer has to be up graded now it and 7000 km and needs changing again is this a common problem.