It could be a fuel problem, but it could easily be something electrical, or perhaps something from left-field such as a blocked exhaust system. Perhaps a sensor somewhere in the driveline is ...

This is a very contentious question and depending on who you talk to, you’ll get a bunch of different answers. Overall, it seems that Navara D22s from about 2007 to 2010 did, in fact, have a DPF ...