Hi I've been searching all throughout the Internet trying to find help on how to fix this problem but couldn't find anything. I did a diagnostic test of my 1994 960 and the only codes in get are 212 which is oxygen sensor but the problem I'm having is with the second code 233. I looked it up online and it says that the idle air trim exceeds control limit. If anyone has any info on how to fix this it would be much apreciated . I asked a couple friends they said it could be either a gasket on the iac or the iac itself being dirty. Another told me to clean my icv but i wouldnt kno where to find that. If anyoe has any info how to fix this thatd be great