Car was idling far too high and wouldn't go back down to where it should be, then a CEL popped up and the car would hardly run.
Can't find my vagcom lead but guessed it was the Idle Control Valve (had one go bad before)
Took it apart this morning and gave it a good clean with brake cleaner then a spray of WD40. Car is running fine again.
Have ordered a second hand valve just in case, but seems OK at the moment.
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