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Mechanic sorted it. Was airlocked so he opened it at the injectors.

Changed the fuel filter and o ring in my 2l tdi skoda yeti yesterday. Didn't fill the fuel filter housing after replacing the filter and primed with the ignition 8 times for 15 seconds rather than vcds prime. Initially started I reversed 1 meter, it cut out and won't start now. Checked the seal and it seems ok, hex bolts are down tight. The filter housing is full of diesel so not thinking of lift pump When I turn the ignition on, the pumps runs quiet for 3–5 seconds, then whines for 3-5 seconds, then returns to normal and stays quiet indefinitely It will do this indefinitely if I keep turning the ignition on and off. My bit of research points towards intermittent air ingress in the feed line from the tank rather than o ring given intermittent whine? Could anyone tell me which line is which? I'm assuming yellow and blue and the high powered line and return and that the green and red are feed line and return from diesel tank? Interested in any other opinions while I wait for the mechanic to take a look!

Crankshaft position sensor sorted the issue, easy enough fix covered by dealer I bought the car off thankfully.

No filter on the haldex 5 as far as I am aware? From What I can see this one hasn't had much of a service history. Haldex 4 had religious services on my yeti before I bought it, but no filter changes = dead pump

Thought I would update this. Got local transmission mechanic to take a look at the haldex when getting the dsg service. Hadex pump was all blocked up so he changed oil and cleaned up pump. Still not working so I'll have to consider whether I will bother replacing pump.

Hi @Ootohere, created a new thread and replied to you on that for simplicity. Thanks!

Hi @Ootohere, Created a new thread for simplicity I'm not 100% sure of service history - I'll have to confirm with main dealer on Monday. It has had regular service intervals but what exactly was covered at each interval is another story. Front wheels were spinning like good-o and for a long period.... could only see my back right wheel but nothing if next to nothing out of it. Though I thought I might have briefly seen a slight gig out of it but maybe that was more hoping. All terrain tyres with good thread, I'll check in the morning what they are but they are slightly more aggressive than my Yokoholma Geolander G015's on the Yeti.

Given my experience with my Yeti and now my Octavia I'm convinced that an awful lot of haldex systems aren't actually working in cars! Noticed since purchase that I could have a bit of tire scrub at times if I took off too fast. I found similar on my Yeti prior to replacement, so I had my suspicions but error codes were all reading clear. Anyhow... I got rightly stuck today after heavy rain on a dirt road. Front tires spinning full throttle and little if nothing from the back tyres. ESP mode both on and off (thought I briefly saw a push from the back right looking back) Eventually just had to wait an hour for the road to dry out somewhat. All terrain tyres with good thread front and back. Error code C111307 reading on car (obdeleven scanner) I think I'm correct in saying that there's no separate filter on haldex 5 unlike the 4? Just the gauze on the pre-charge pump? I suppose first port of call will be an inspection underneath, a service, a gauze cleaning/replacement and go from there. Main trouble is I'm in rural Australia without the use of my toolshed back in Ireland. My boss might have the basics. There is a main VW dealer in town but I'm sure they're no cheaper than home! I'm not 100% sure of service history - would have to confirm with main dealer but was very hard get a concise history from the dealer prior to purchase - mainly just dates that a service of some sort occurred.

Just to update this thread. Mechanic changed the crankshaft position sensor - was a lot of dirt/debris on the end of it Haven't noticed the issue for the past 2000km + since changing so hopefully out of the woods on that issue. Unfortunately got it stuck offroad today.... and the awd system didn't seem to be doing much to help but that's for another thread...

Thanks, I should probably have created Thanks, I should probably have created a new thread because the first post was a read herring which is due to the way I read the codes. My own fault and probably derailing the thread a bit now! Gearbox is running fine and only throwing up the one non specific code than now that I'm reading it just turning on the ignition and in park. Engine speed inp.circ P072600 Reckon I have the problem figured out which the main code is P032200 - Ign./distributor Eng.Speed Inp.circ to do with speed/ crankshaft sensor which seems to be a common sensor to fail I'm taking it to a garage next Monday anyway so should get to the bottom of it then.

Initially I was driving in a lower gear at higher revs to "burn off any soot"... but became the issue became much more apparent the higher the revs. Was just revving hard to demonstrate the problem and capture it on video. It is easy to demonstrate the higher the revs. Maybe you're right but the car has no issues going through the gears and the issue is showing up when in manual in a fixed gear.

I'd have to double check that one with the dealer when they open up again wednesday.

I'll add to this that I'm almost certain it's not a gearbox issue which was my initial suspicion. Gear changes are fine. It's the blip/splutter/ engine dieback that is the problem.

Yes comprehensive main dealer service history which I double checked with the dealer. Last service less than 5000km ago

Naturally not driving it to 5k revs ordinarily. Revving it intentionally to demonstrate the issue with the blip/splutter/ engine dieback that is fair less noticeable during normal driving, much more noticeable in sport mode and the video above speaks for itself when revs up above 4k revs.