Re: Cerberus code from Mass Effect Trilogy (PS3)

Cerberus Network codes have been discontinued. The Cerberus Network DLC, including Zaeed and Normandy Crash Site, should be available for free without redeeming a code.

PS3 is known to be difficult in this regard, however. If you have issues, I'd recommend contacting official support: http://help.ea.com/contact-us