Sweet...you posted up some codes and kinda expect us to go look up the names. Yes, I'm being a bit sarcastic because to help you and move on to the next guy in line...it would really help a ton if you provided the name with the code, your year, model etc. Any recent work that's been done.

Off the cuff 300 is misfires usually plugs/wires/coils
and 102 is ...maf or tps.. likely a contributor to 300