J.R.

No but it will almost certainly be a clagged up throttle valve and intake tract from the EGR soot which assuming I am correct means that your car has been screwed by the emissions fix. Cleaning it will give you a percieved 30hp boost if not more. I would not block off the EGR but fit an emulator/simulator (which I have already done) to prevent recurrence, you could also consider having the emissions fix rolled back to the previous cheat software if you are experiencing frequent regens (which I have also done) but the EGR emulator/simulator will stop all EGR. It will only inject the diesel when the engine is running, not after shutdown when the fans are running but I agree it is undesirable and the reason I had the rollback done, in 2 years and 60K miles I have only experienced the fans running twice, before it could be every journey I made.

Not that we are likely to hear the words spoken on this forum but does anybody know anybody who has anything but good things to say about the Yeti they own or have owned? They really seem to be remarkable in terms of owner satisfaction, my car is no different under the skin to the MK2 Octavia that I had before (MK1 before that) but such a different character which still immensely pleases me in a way that the Octavia didn't in the slightest. It cannot compete with the Octavias for carrying capacity which has been and still is essential for me but I no longer care about that so strong is the love affair.

Mine is a 2015 Yeti being the same platform as Octavia, all I have is the Maxidot which my MK2 Octavia had, I had not appreciated that a 2015 MK2 facelift Octavia had a coloured LCD dashboard with information like that displayed. I agree that a VCDS or equivalent scan is the next step to take.

"Do you have your app working?".................... "I need you to go to my journey"..................... "I'm sorry I can't stop the car, I need you to............." FFS!!!! I know some of the above is paraphrased from memory but FFS! Thanks for posting that.

You cannot be pressing hard on the accelerator if the upshifts are happening at 2000 rpm.

Can you imagine having that as your next door neighbour, imagine that you were a teenager at school or college and that was your father! Here's hoping that he has not been able to procreate.

I don't know if there is such a thing Probably the low coolant expansion tank level indication.

Not a chance in hell which makes me doubt anything else he says Was this live data of the output of all 4 wheel speed sensors? Anything other than that was a waste of your time and money. Have you really still not had the fault codes read even by the mechanic who dropped your trousers? There should be a fault code for one of the wheel speed sensors.

https://tafmet.pl/english/egr-valve-simulators/221-egr-valve-simulator-with-blanking-plate-for-vw-audi-skoda-seat-20-tdi-cr-ii-euro-5.html

Mine was regenning 3 times during a 1000km autoroute journey at wide open throttle towing a massive trailer massively overloaded then it was trying to regen every day after that, my journeys were either too short, 5km which we know isn't enough or 20km which was not quite long enough but should have been, it was all a result of the disastrous emissions fix rollback software which was done before I bought the vehicle. I forgot to mention something important, after fitting the EGR emulator/simulator I paid to have the ECU reflashed with the original emissions cheat software, it was that which stopped the constant regenning.

The only reason to replace the module is if airbags have been deployed (and it can be sent away to be reset if that is the case) or if there is no communication with it. You say "airbag error" and "20+ airbag errors" was this a dashboard warning or a fault code? A proper diagnostics tool like VCDS would give details like drivers seat thorax airbag open circuit, a garage saying wires and modules might need to be replaced are beyond their level of competence and probably lack the required diagnostic kit.

Yellow connector under the driver or passenger seat. Do you carry rear seat passengers that like to stretch their legs or children? Its not about erasing errors or replacing the module its about finding and repairing the fault.

My MPG was way worse when I visited the Gatwick area where I had a house until 3 years ago, the lack of traffic here and my journeys other than to food shops not having traffic lights, roundabouts and very little traffic make a big difference as does the 80kph = 50mph speed limit. My pal is on his way here from England, he left the snow behind and it will be 17° tomorrow when he gets here 😃he is driving a new VW transporter towing a new caravan, I reckon 6.5m long, he got 19.5mpg on the first tank of fuel

When it happens drive off again and do a couple of kms to allow the regeneration to complete. The attempt at a regen from cold start (which aint never gonna happen!) is after several aborted regen attempts, when this was happening to me I was also doing 20km runs, they were not quite long enough from a cold start for the engine to get to regen temp and then complete the regen, another couple of km would have done the job which is what I did as described above. Knowing that in the future (moving closer to town) my journeys would be shorter with maybe one 20km journey per week I fitted an EGR emulator/simulator, now the car regens once per 1000kms and I am unaware of it, in 4 years and 60K miles I have heard the fans running on after shutdown only twice.

Mines a different vehicle with a different engine which also has a bigger frontal area, higher drag coefficient and 4x4 transmission sapping the power but I am up to 46mpg after 4km from a cold start and can be at 57mpg on an 8km each way round trip with a 90 minute stop. They are the best figures with little traffic and only one traffic light, a typical journey to town shopping will hit the 46mpg after 4km and remain at 49 with the traffic.

Once up to that speed to maintain it on the flat a twin cylinder 750cc engine would be even more economical but harsh, maybe something hybrid will appear.

Isn't the Yeti based on the Golf MKIV platform?

Ok, I understand now, I dodged a bullet there!

Good on you for accepting responsability and taking the correct measures to avoid dazzling oncoming motorists, its a shame they can only work to the detriment of oncoming motorists because I can definitely see tha advantages for the driver, most are too selfish to revert to manual operation. The reason your vehicles sensors are not seeing the oncoming vehicles is because they have correctly dipped their headlights! You are right that they sem to work when following behind a vehicle but whilst they mask the portion of the beam which would dazzle them they still give full illumination outside of that area, frequently the ones that dazzle me now are those one or two behind in a group of oncoming vehicles. I had one behind me recently and whilst they were not dazzling me they were illuminating the oncoming roadsigns even the overhead ones so much that the reflection was too bright for me (we have all had to dip our lights when facing a really reflective roadsign outside of a lit up area) worse still I was getting flashed by oncoming motorists, not intended for me of course but the vehicle behind. Finally I recall the first time several years back I experienced these awful matrix headlights, I was on a dark and deserted autoroute in the middle of the night, a vehicle joined behind at my speed keeping a constant distance with his headlights on main beam which dazzled me, I put on my rear fog light and the headlights dipped instantly, I should have realised that it was quicker than a driver would react, so I turned off my fog light and within a few seconds the main beam dazzling returned so I did it again, - you can probably see where this is going!!! After the goon had done this to me 10 times (or so I thought) I got annoyed and slowed down, let him past then followed him close behind on full beam. I felt guilty when I finally realised what had been going on.

You are joking surely, I paid about €120 each unit when I changed mine for France

That is amazing for a petrol engine, what is it like around town?

The valve releasing to relieve pressure will not unscrew the pressure cap. The coolant does not blow past it but through it past a spring loaded seal through an internal gallery. I suspect the OP has misinterpreted the free movement of the cap when fully tightened or has mis-described it. I don't know whether its possible to cross thread the cap but if it is it would give a situation where it clicks but isn't closed and sealed so would leak coolant and not have any residual pressure

Layshaft bearings, they can go on for decades like that, be concerned if it gets progressively worse, mine used to whine after pulling a massively overloaded trailer (several tonnes) through mountain switchbacks but would quieten down the next day, I never changed the oil in 325000 miles. Does it do it in all gears or just the intermediate ones?

I chose not to fit the blanking plates so that I could easily revert to standard operation (swapping 2 connectors) if ever I had a problem so as to rule out the fiddling of the ECU data by the emulator simulator or if it became a problem for the CT test. My EGR had not failed at that time, it was a pre-emptive measure, I don't expect the EGR to fail now that it is not functioning, they were only designed to work during the MOT tests with the cheat software 🤣 Its invisible if some thought is given to placement, running of cables etc so there have been no problems with the CT and there have been no electronic problems so it does what it says on the tin! How it works is to take the command signal to the EGR cooler valve and give a corresponding EGR valve position sensor reading to the ECU so it thinks the thing is working and has been actioned, it also intercepts the MAF sensor output to the ECU and tweaks it according to the commanded EGR reducing the flow figure accordingly, en bref it fools the ECU that the EGR is operational and doing what it should be doing. Edited, it also does the same disabling and fiddling with the output reading of the throttle valve (which pulls through the EGR gases) although it does not stop it functioning as an anti-shudder device on engine shutdown.

There are different strut diameters fitted to the Yeti, models with smaller diameter brake discs have 50mm instead of 55mm diameter struts, - I think those are the correct dimensions but you can check, the message is to be aware that there are differences.