Blobthebuilder

Hi, was hoping for bit of advise, I had IBS fault which i fitted replacement 2nd hand module and it has cleared now, terminal 15 output 1, 2 and 3 faults which with electrics on but engine off will clear but come back on next start and a persistent glow plug activation fault on 1, 2, 3, 4 and 6 could it be faulty module and would it affect terminal 15 fault aswell I believe is ignition, the car is a 2006 530d m sport pre lci and it is starting and running without any problems