Kath

Quite likely linked. Diesels do not like short trips. A regular good thrash down a road (sorry officer a bit of spirited driving) will help but a regen every few hundred miles is not surprising with a few miles each day.

Yes we replaced the EGR (valve plus cooler) ourselves (CJCB 2013 2.0tdi engine). It took about a day to remove and replace and you need to be double jointed for a couple of the bolts but if you are able to do it much better than a 4figure garage bill. Certainly on my engine you did not need engine out. An aftermarket EGR was about £360. It’s the cooler which is the issue, it becomes blocked solid, but you cannot buy that in its own. Also what indicates you need a new DPF? I was getting the flashing glow plug light when it tried to regenerate but this was actually a turbo pressure fault triggered by back pressure from the blocked EGR. I still get it very occasionally but it immediately resets and the car now has over 190k miles on the original DPF.

Problem solved, mechanical issue with new valve. Bolted old valve and body to new cooler and fault gone. Pity you cannot just buy the cooler

I have had similar on a 2013 2.0d with 180000 miles. it was a combination of two things, slow response due to carbon deposits in the variable vanes of the turbo. This did not require a turbo rebuild, if you remove the turbo and split it the variable vanes are in front if you, a good clean off with carb cleaner & petrol got rid of a real notchiness. it still however came up with turbocharger/supercharger under pressure error. The EGR cooler was blocked solid. The valve body and valve was fine unfortunately you cannot buy just the cooler. Replacing this (good luck with the mount bolts, they are a nightmare) - error now gone. an occasional bottle of turbo / diesel system cleaner in the fuel tank keeps it clear.

A further update, we have checked right into the inlet manifold where the egr feeds back in and also the tube where it passes through the back of the block are completely clear. we tried fitting the electric unit with the position sensor off the old one (that was working but the body was blocked) but that caused a constant hunting and a P0403 fault immediately so has been taken back off. The EGR flow is varying with throttle as you drive along as you would expect. at idle it is around 22kg/hr, it goes into the 60-70’s as you accelerate. Taking your foot off the throttle quite quickly seems to be what triggers it, the flow drops momentarily to 0.2-0.3 kg/hr.

I have an Audi A4 2.0 tdi technik. A short while ago it came up with P04010 EGR insufficient flow detected error. We have cleaned the pipe from the block to inlet manifold (dirty but not blocked) and replaced the whole EGR/cooler unit (EGR valve, vacuum actuator and sensor all come as one unit) - the old cooler was blocked solid so the error code made sense. we cleared the error code after replacing the unit but it keeps returning. Sometimes, but not always, it triggers the engine management light. any ideas please?