[SpokenHands]

Originally Posted by bravo261

now that's a bit of info i can appreciate should the problem come up again. thanks sincerely!

The issue is known in some diesel cars that only do short trips (my commute is an 8 miles round trip in mostly built up areas with a 30 mph speed limit) where the diesel particulate filter clogs up, also causing issues in the EGR valve. Have been asked to take the car on a high speed burst on the motorway for at least 20 mins every few weeks.

Interestingly my use of a premium fuel (Shell V Power Nitro) that is 98 RON and added detergents seems to have worked in that all engine components were entirely carbon free. (Though this car is only 18 months old and only 8500 miles since new. )