I believe this is the NEC protocol where the second 8 bits are the Sub Device code. When you hold down the button of the above code the 0154 0055 0016 0e3e is the part that repeats. In terms of clean it's not bad and should work fine, I would suggest it is easier to generate clean codes via Make Hex etc. than to clean dirty ones, but others may disagree. I remember previous threads on the best way to accomplish the 2 second button press so try a search.

dwg