Interested in your last comment
I have had the EML light issue now for two years on and off. Had 6 visits to dealership and they run TPIs. Had new software, glow plug 3, air pipe to turbo replaced, multiple DPF force regens (all data from last visit which I sneakily screen shot suggests soot and EGR are all ok).
On the last visit they say they cant find the issue and nowhere left to go. Always the P20ee and 31103 SCR Bank 1 efficiency. Now with customer complaints as getting ridiculous they cant fix after multiple attempts. Under warranty but they seem reluctant to replace parts
Light on in June and July. They again couldn’t find a fault so deleted error did a 100 mile test drive and said “there you go sorted”. When leaving I sarcastically said see you in a couple of weeks. Early September light back on.
Specifically the light only comes on when on a long run 100 mile plus and not every run. Generally this is whilst running at 70mph, under adaptive cruise at around 2000rpm. No change in performance
There has to be something happening under these conditions?
MPG wise sometimes these trips return 40+ MPG sometimes 44 but then on others, which feel like very similar conditions, can be 36 ish
I am so frustrated at the lack of technical nouse to sort the issue, costing me time and money and the dealership no doubt. They are now offering to raise a technical enquiry which I think means logging onto a VW portal which they have done before and they want the van back again for fault codes even though they have down loads on multiple occasions. Interestingly they can tell me exactly what speed I was doing and all conditions when the error was triggered but not date.
I my head I would be replacing the key SCR components as a starting point including NOX sensor but my logic maybe mispla