I replaced my bottom bracket with a Shimano 113mm cartridge.
Now 3 months later its making a creaking noise; the sound goes when free wheeling though.
Do l need a new cartridge?
Creaking from the BB area can be hard to localize, but there are basically 5 sources:
Since you said you replaced your old one, I assume you have to tools to remove it. If that's the case, rather than jump to the conclusion that you need to replace it again, take it off, clean the threads and put some grease there, put it on again. This should help.