[hagcam]

Jeff
I had exactly the same problem with mine. Memory failure code.
I took it to the DD dealer and he told me that he could just reprogram it and it would be fine. My ECM was several updates behind. They wiped the memory clean and then tried to reprogram it, but the ECM would not take the update, because of the memory failure. They could not load back in the old program because the way DD works is once you wipe a program clean the only one available is the latest version. So there I was, I had gone to DD with a working (but degraded) ECM and they made it so my ECM was worthless, I was angry. After a lively discussion they sold me a lightly used ECM at a reasonable deal.
My ECM had been used by the PO for several years with the memory failure.
As Michael has suggested, I would suggest looking for a used ECM on EBay,(you have to know what version of ECM you have, II,III,IV etc) get it programmed for your bus. Your ECM may be worth a few bucks to those that reprogram them and they may be able to fix it.