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A couple of things spring to mind. Firstly, what are the figures? (By how much did it fail?) Secondly, now your DPF is on the MOT testers radar, it might get further scrutiny if tested by the same tester. Nothing wrong with going to another MOT test place. Solutions: First, put some Diesel Clean or similar into the fuel tank and give it a good run. Load up the car with people, find a hill and boot it up there. Get the revs up to give the injectors a clean. (A garage can do a more specialised injector clean, but that's more cash.) Then, with the car "as is", i.e. with a dodgy/gutted DPF, (and as a layman, bear in mind this is a "Just get the effing thing to pass at minimum cost!" fix), my cheapest quick fix to get you through the MOT would be an EGR blank and (for the purposes of the MOT) remove the air filter. Those fairly simple and cheap things should get as much clean air into the engine as possible, which, if your fail is marginal, might just reduce the smoke enough to get you through the MOT. But it's a bit of a case of grasping at straws. Even if you manage to pass the emissions, a vigilant and conscientious MOT tester will be giving your DPF a close look, now someone's already pointed it out as being suspect. Let us know how you get on. Good luck!

This seems to fit the rings.

I think modern oils, particularly synthetics, are perfectly happy at 100 C. Oils really have improved enormously over the years. Not sure about water condensation in the oil, never really thought about it, TBH.

I once searched for Cognitive Behaviour Therapy using "CBT". Oh I say!

Yeah, I initially thought that, but I figured it was best to check. Now I want to change the settings on my car so it measures fluid temps from 0 deg C.

Thanks Roottoot! I had a search for rings, but that's exactly the thread I was looking for.

Interesting! What are the 0-1400 numbers on the X-axis?

I've had this car from a few months and cleaned it inside and out. I just went to check the wiper blade size, and as it's dark I needed a torch. When I shone it at the windscreen, I saw this. Now, these marks are on the inside of the windscreen. They are a pattern in the condensation on the inside of the car. (I haven't driven the car for a week or so, and so I guess it's got a bit damp in there. I've already put a dehumidifier in the boot, and I've just added one on the transmission tunnel too.) I haven't used a screen-mounted satnav in the car, though I used a sucker mount when I drove it home from original purchase, but certainly nothing directly in my field of view. Besides, I cleaned the inside of the screen last week pretty well with a combination of 70% isopropyl alcohol and elbow grease. My first thought was that the car has had its windscreen replaced, but as I said, these marks are on the inside of the screen, so that didn't seem to fit. Anyone else noticed these on their car? Are they caused during the manufacture of the car? They rub off easy enough, and I haven't noticed them before today or in normal driving. Only when I shone the torch on the windscreen. I'm quite perplexed, TBH.

I think it's the DQ381 in the 190TSI. I did not know that, so thanks for the tip.

Hi @weyland Just by chance, have you a clear image of the rear of the camera you fitted? I ordered one from the link you provided, however the camera I received is not quite the same as the camera in their description. I think it's just a slight product modification, but I'm wondering if your camera is the same as mine, or subtly different. Here's what I mean. The three cameras possible to be ordered are A/B/C taken from the AliExpress link. (I've ignored camera C as it's clearly completely different.) And here's what they sent. The profile and dimensions of the camera (the important stuff) match Camera A. However the back wiring image seems to match Camera B. It's not an issue, but it did cause a minor "Awwww Hell!" moment when I first looked at the camera. :D I'm wondering if there are a few different suppliers of this camera, and they just send what they have, so long as it works and fits. From the other side, my camera appears to be the same as yours, so I guess it's just a slight difference between their product image and what they actually send. Thanks. :)

I watched this video and the first point on operating temperature piqued my interest on oil temperature. So I monitored my car on warm-up, and sure enough after about 5-6 min, my car water temperature was in the middle of normal, however my oil temp was still reading "--", and only after a few more minutes did the oil temp hit 50 deg C and start registering. On the motorway in summer, I recall it being around 95 deg C, but pootling around town today at 13 deg outside temp, oil temp was around 80 deg C. Does anyone know what the minimum oil temperature is for an engine to be regarded as fully warmed-up?

I'm not surprised that diesel sales are down, but I am surprised that diesel MHEV sales are so strong. Not because I think there's anything wrong with them, I'm just not sure who's buying them. (Source https://www.best-selling-cars.com/britain-uk/2019-full-year-britain-new-car-market-overview-and-analysis/)