I have a 2013 650 GC built in July 2012 and has been in the shop for 3 weeks diagnosing DTM. First then they replaced injectors + spark plugs as part of extended warranty, but DTM still showed up. Then they proceeded to replace low fuel pressure pump, didn't work. The last update I have is that they replaced the high pressure fuel pump and are still unsuccessful.
Thankfully all these "repairs" have been covered by my extended warranty. It seems from my research for most people the HPFP has fixed DTM, and if not, they received a new engine. Is a new engine seriously the solution to this?!
On one hand, I'm relieved I have the warranty, but also nervous as to what will happen next.