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Id say look at maf sensors, crank sensors, cam sensors etc. However you'd expect fault codes if these were failing. Could it be engine or gearbox mounts?

Don't tell them you've done a obd scan as they might try and wriggle out of it by them claiming you've erased codes which you haven't. Also if you've bought it on finance then you can tell.tge finance company it's not fit for purpose stating your case. Aldo as it's under Audi warranty they should be acting on this. I'm assuming it's full Audi service history.

Glad it's working. I'm going to pin this post and change the title slightly to make it easier for others to find. I do believe it's still naughty Audi wanting to charge a subscription for features in my opinion.

Hi the measurement is a over complicated time span since the last regeneration, the bit you are interested in is the code for the particle trap which is telling you that the entry to the core is becoming blocked this won't affect the regeneration to start with but will further down the line, the core of the DPF is a bit like a sieve in its collection of particles and if you get some big bits it will throw that code, the Cataclean removes/melts the larger particles and restores the holes in the core to their former size so it breaths a lot more efficiently, the Millers is good but is only really helpful if doing a lot of mixed driving and you may want to switch to an additive specifically for cars doing a lot of town work as I have had to, there is still no substitute for a long blast on a motorway every so often, let us know, BTW the Catalan has no cetane booster in it as it simply cleans. Steve.

Hi try ECU Testing phone them up and ask if they can modify your unit which will then retain its original coding they recently helped another member on here by substituting his coding on the original unit which was knackered to a new donor unit he bought on line. Steve.