Hi, as per heading really, driving my 1.8 T BEX eng code the other day and the engine management light came on, there was no loss in performance and no mis fire, drove it 100 miles or so, got home and disconnected the battery, when reconnected and started the light was out, drove 70 miles the next day with the light still out, although I did notice the tick over was a bit higher sometimes, it would tick over at 800 revs as normal, then at the next set of lights would tick over at 1000' and so on.

Today the light has illuminated again, still no loss in performance and still an irregular tick over, some times it feels a bit lumpy as if its missing but it's not.

Any input will be great, I suspect some sort of air valve or a air mass meter issue, gonna get it scanned tomorrow and see what that brings up. but in the meantime if anyone has had the same issue please feel free to elaborate.....Ta.