An issue i see quite often is the EGR valves on the 2.7 TD is EGR error codes and the inability to rev over 3000rpm.
Many if not all "myself included" just chuck on a new set of EGR valves and be done with it, that is a rather expensive ordeal...
Might be related to a previous problem, but the battery is at 11.8, and was serviced couple months ago, but was sitting for 4 weeks not used, Error messages attached - Ventilation related? MAF?
Serviced about 2-3 months ago, new air filter...