I have since then, but have corrected them so far. I do not think they are related as the leak is not something that occurs at normal boost levels.
The 171 was from when I checked on the orange nipple and accidentally pulled the clip out too far and subsequently lost the plastic ring when it and the o-ring fell out.
I've cleaned the MAF &, Turbo Boost sensors as well cleaning and re-oiling my air cleaner and that has cleared the other two.
P0420, p0171, P0?? I forgot the last one, but it was like P0129 if I remember correctly.