EdHilton

Hi @wiilydog , yeh that was actually changed before the separator as it was a cheaper part than the others, and also seemed to also be positioned slightly out of alignment in its housing. However after a long run the misfire codes were still cropping up…

You’re welcome! Are you also getting multiple misfires with no real sign of deceased performance or fuel consumption? My local garage fitted it in a little over an hour I think. Apparently it’s at the front end tucked under the radiator (near the water pump?) so they lifted the car but said it wasn’t too bad to access. I’ve included a diagram sent by a very helpful Skoda mechanic - the second picture highlights those parts in red. Cost was about £150 for the labour (sadly everything leading up to finding the cause of the multiple misfires was £480!! including a trip to a specialist VAG who diagnosed it, but initially said the whole camshaft would need replacing!) Make sure they clear any fault codes. Then I took it in a couple of long drives to allow everything to warm up (the misfires seemed to happen when everything was hot). Took it back to garage to plug in again to make sure no more codes came up. Hope that helps! Good luck 1066_001.pdf

Hi @netman82 thanks for your interest. Incidentally I’ve just got back from my local garage for a scan and happy to report it’s all fixed! The parts required were the crankcase breather/oil separator and its cover (04E103464AM & 04E103729, pictures attached). Got them both from Skoda direct for about £70 in total. The other part I listed that was on autodoc (https://www.autodoc.co.uk/bogap/18571281) turned out to not be for my car. As a complete non-mechanic I’m struggling to understand how two new bits of plastic have fixed the issues as the garage said there was no visible signs of damage on the old parts, but hey ho! Kind regards Ed

Have had a conversation with a technician at Skoda who said the part number for that engine block breather valve is 04E103175. However he thinks the PCV valve actually sits on the side of the crankcase and which degrading of the valve is a common issue. These seem to also be called oil trap / crankcase breathers… https://www.autodoc.co.uk/bogap/18571281 The part numbers he quoted for those were 04E103464AM for the breather/oil separator and 04E103729 for the cover.

Thanks varaderoguy. Do you know if those parts on eBay are what the valve is supposed to look like? I’m not sure what I’m looking for to be honest. The diagnostic company advise against stripping the camshaft down to replace the valve but there must be a cheaper way!

Hello helpful Octavia folk! My 2017 plate 1.4 TSI DSG (97k miles, regular servicing at trusted independent garage) has been diagnosed with a faulty Crankcase Ventilation Valve by a company called “Scantec” in Hailsham, Sussex. It’s had an issue that’s been coming and going for a while now where once it was warmed up and usually after long drives it would have auto stop/start error followed by flashing EML when stopped, but would go away when moving off, and didn’t feel much like a loss of power or heavy fuel use (still getting 50+ mpg). Multiple engine misfire codes detected, concentrated on cylinder no.3. Spark and coil packs were replaced a few months ago and seemed fine but the problem had returned, and my local garage sent it to Scantec where they’ve diagnosed this PCV fault. Yesterday was a bit sad because the usual car part suppliers don’t sell these valves as standalones, and VW group said that the whole of the top of the engine would need replacing, so I was quoted nearly £2,000 after labour by my local garage. For a car that’s worth about £6-7k I can’t really justify that expense, gutted though as I think it’s still got loads of life. This morning however I have come across these parts on eBay! If it is just the PCV valve that’s faulty, please could you kindly tell me if these are the correct parts (not sure what the difference is between the cylindrical valve and the the longer hose section?) if so that‘ll be an enormous relief - £30-40 plus a bit of labour is a bit more positive than £2k! https://www.ebay.co.uk/sch/i.html?_nkw=crnkcase+ventilation+valve+skoda+octavia+2017+1.4+tsi+mk+iii Thank you kindly in advance for your expertise! Kind regards Ed

Thanks for your replies @toot. Those poor consumption figures that I posted about a couple of years ago happened a few months after air filter was replaced. I put that down to an anomaly as since then have been getting 52+ mpg (mainly motorway runs). Usually fill up at Asda in the south London/Surrey area. Since plugs were done a couple of years ago have put in a few tanks of V-power/Tesco Momentum, and also used one of those Hydra Pic treatments so was a bit surprised plugs have gone after only 20k. They were bought from ECP - like you say maybe down to a snide set perhaps? Coil packs were changed a couple of months after plugs.

Hi everyone, 2017 1.4TSI DSG just had MOT done at local trusted garage. They said there was a misfire on cylinders 1, 2 & 3 and asked what fuel I’d be using. This is usually standard supermarket E10, sometimes a V-Power/Synergy E5 every few tanks to clear out the crap fuel. Garage said avoid using E10 as it’s wrecking the spark plugs on lots of VW 1.2 & 1.4 engines recently. Previous “Bosch” plugs were fitted a couple of years ago and have only done 20,000 miles. I did notice recently it seemed a little sluggish especially from standing start. Have others had this issue or also using supermarket petrol with a mix of petrol additive (HYDRA PIC-24 etc)? Thanks in advance.

Thanks very much for your replies guys. Unfortunately couldn’t get a printout from the VCDS scan but the garage I took it too said there were no fault codes whatsoever. Have run a tank of Shell Premium E5 through and has sat mostly on the motorway and it seems to be OK- back up in the mid-high 50s. Could have been a dodgy tank of fuel? Also since I bought the car in March I haven’t really been driving when the outside temp drops down to 3-4 Celsius yet, and on reading one threads that usually causes a slight drop in economy.

Hi everyone Got a ‘17 plate 1.4 tsi DSG. Normally get 55-60mpg on a motorway run (where it generally sits), but couple of days ago it dropped to around 47, also on the motorway (and having done 58 ish that same morning!) no change in my driving style and can’t say there were more hills than normal. Obvious stuff like tyres etc only recently pumped up. This year it’s had new sparks & ignition coils, air filter, oil & filter change. It has been saying “inspection now!!” in a very Germanic manor on ignition start up/off, but I’ve not paid notice to that as I presumed that was per the Skoda service schedule. Any one else had this experience? I should add there are no warning lights, and car still runs absolutely fine. I’ve got it in with a garage and waiting to hear the results of their plug-in test. Could it be clogged injectors (worth trying a fuel cleaner/additive)? Or just the sign of this new crappy jungle juice we’re having to deal with…seems strange it’s so sudden. Apparently the fuel filter is lifetime fit. Dodgy oxygen sensor perhaps? Thanks for your time Ed

Hi everyone, thanks in advance for your advice and time. I'm a very pleased owner of a 2017 Octavia 1.4 TSI DSG. Still astonished with the fuel economy, which is better than my previous Astra diesel's! As we're all aware there's been a big spike in catalytic converter thefts nationwide. It seems hybrids and older cars are the current targets but I was hoping someone may shed some light on whether the Octavia's are well protected? After some research it seems the Fabia's is located behind the engine block so should be secured, but I couldn't find much info on the Octy - hoping it might be the same? Kind regards