Disclaimer - I can only tie the following to my own experience over the last 6-12months with my CAYC engine coded 1.6 common rail diesel Mk2 Octavia. Also, I am not a mechanic, nor overly handy with a spanner. I do however have "The Nack" as Dilbert's paediatrian once put it, so tend to be able to see correlation and decide if causation is linked or not so... here goes! How to tell early on and as symptoms persist whether your EGR is starting to fail and what will happen as it gets worse, b