why all of a suddan does engine light come on

[s3gazz]

hi was on the motorway today put my foot down for a few seconds till about 100 and then 5 mins latter the engine light come on what the foooook.

checked on vagcom and this come up 18020 engine control module incorrect coded intermitent.
along with something to do with the cat but its been de-cated so thats why.

when i come on to full boost and the turbo kicks in about 3 1/2 to 4 rpm i get a spitting spluttery noise from behind the dash what could this be this been happening since it come back from audi recall could this be why tar guys

 

[Sandip]

Did Audi do a software update on your car Gaz?

 

[s3gazz]

i told them not to do any software updates on it sandip so prob not

 

[hades-]

you may have said dont do updates but its if they told the spanned man not to do them
or if he read the slip
did you have the cat wrote out when you had it removed ?
from the code they may have upgraded