Dpf software update

[niteram]

as Rusty says, most technicians are just fitters, if the computer says part A, they fit part A, if that doesn't cure fault they have no idea what to do. there are a few that do know what to do but they are hindered by time constraints as every job has a set time allowed to do that job. Diagnosis and fault finding/tracing can be a lengthy process, the dealer wont pay for it and neither will warranty companys, most customers don't like huge bills for this either, so the techs are encouraged to do the quickest/cheapest repair which in most cases is to swap in a new part.