My 2017 Octavia VRs estate diesel is having some issues. It’s going into limp mode often. I have changed glow plugs as the glow plug light came on but then to find out it comes on to out the car in limp mode. I keep getting p0299 code. Don a smoke test found a leak and replaced the pipe. Erased the code. Limp mode 20 mins down the road. Changed boost pressure sensor and n75 valve. Still the same problem. Done a regen. 0.2grams of soot. The dpf is actually very clean. It does idle at 1k rpm even when warm. Also changed the dpf sensors. Still the same. Boost absolutely fine with no smoke or whines etc so anbsolutly confident my turbo isn’t failing. anyone had this issue before and know what it is?

My understanding is that it's the ash content in the DPF that is the rate determining step rather than soot. The DPF can look clean as the ash is pretty well the same colour as the filter material so won't show up.

These things do have a "service life"; my 2016 vRS diesel at 146,000 odd miles with similar issues to yours needed a replacement and since then no problems. Short journeys will exacerbate the problem. Cost from Autodoc for the Walker unit was around £1200 delivered all charges paid whereas cost from Skoda was £1800 +VAT.

Edited 23 February23 Feb by SwallownAmazon

What's your oil consumption like?

Makes sense with the dpf mate thankyou I’ll deffinatly look into getting a dpf. And my oil consumption is okay had the car 8 months and low oil light has popped up 3 times changed oil and filter after each time it came on and it hasn’t been about 3 months since it last came on.

On 23/02/2026 at 11:49, Dan143 said:

Makes sense with the dpf mate thankyou I’ll deffinatly look into getting a dpf. And my oil consumption is okay had the car 8 months and low oil light has popped up 3 times changed oil and filter after each time it came on and it hasn’t been about 3 months since it last came on.

Oil consumption aside, what is the condition of the oil like? Issues with NOx/O2/etc sensors can cause the oil to degrade a lot faster - not necessarily 'burning' it in the traditional sense.