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You'd think sensor impairment would be logged in the cars error codes although in the early days and probably still true Formentors threw up many error codes from their systems. What they mean is it's currently not showing any errors.... they probably cleared them down. Where Obdeleven is useful. You can read the errors although you still get charged diagnostics but atleast you can see what they should be looking at.

That was my on the road diagnostics last year on holiday when the dash through up assorted errors in my Ateca. Top view stopped working, reversing camera. It showed an ABS fault, cleared it down, functions returned then got triggered again. That one was a known fault that ABS sensors can cause delirious effects on other systems. Here you need a sharp tech guys in the dealership.
 
I don't want to give away the solution that @East Yorkshire Retrofits used, because as a business they have overheads to cover and have developed the expertise and necessary equipment to help owners where the main dealers are just fobbing us off. I thought coding might be the answer, and was happy to have these systems coded out rather than constant error warnings. This was not the fix. The car now behaves immaculately and is once again a fantastic drive.

I had a longish run to York and back for an overnight last week, and with the almost continuous motorway roadworks, speed limit changes and traffic build up I was reminded that driving in the UK is no longer the experience it was a few years ago (on main roads at least) and that the self drive capability the car has gained since the fix makes for a very relaxed drive.

Reading a couple of threads on similar issues the dealers do appear to just accept that some car owners have constant faults and have developed a series of responses entirely designed to fob you off. The problem in part is that once the car has been in for a fix that didn't work it can be months until it can be back in again if you require a Courtesy car, The months pass and sooner or later that customer will trade the vehicle and it will fall out of warrantee so no longer the dealers problem.

I had mine back to Cupra repeatedly, and when assured it was fixed it faulted driving off the car park. When I went immediately back they said I'd need to book in again for another day or even 2 so they could have a good look at the issues. I can pretty much categorically tell you the main dealer will never implement the fix that @East Yorkshire Retrofits did because it gives the vehicle capabilities that are not type approved.
 
Intriguing the last bit "vehicle capabilities that are not type approved.".

The MQB Evo where Vag dug a hole for themselves and those secondhand cars passed on are likely to be awash with issues in the very early ones if the driver grinned and beared it.