On 22/12/2020 22:57, Anthony Nonymous wrote:
Hello All. Advice appreciated and I would have posted also to uk.rec.cars.vw.watercooled, but that group seems to be pretty dead, now.

The problem: diesel particulate filter (DPF) light came on, briefly, about 2 weeks back. After a week or so of no problems, DPF, engine management and curly symbol light (glow plug indicator, but also indicating other issues) lights all came on and stayed on, with the car stuck in limp mode. Various amateurs plugged in assorted gizmos and failed to identify a relevant fault code. Handed over to a trusted local garage (independent) and their diagnostics also said all was well, so they reset the fault codes and attempted a forced DPF regeneration; no dice. Concluded that the fault might be any number of sensors, but that the investigative work would probably cost a significant portion of the car's value. So, we're stuck with car in limp mode.


snip

Although the sensors are a known problem on these, depending on mileage
and usage, the EGR or DPF could simply be clogged. Not what you want to
hear, but not uncommon.

Firend (who is an independent mechanic) has had to to replace the DPF
and EGR on 2 relatively low mileage Golf Mk6 in the last year. Not a
trivial task either.

Apart from routine servicing, a large proportion of his workload is
emmisions related problems with modern diesels.