U are right. It is just the vent. I recently changed intake boots and hoses from maf down to icv and throttle body. Since that the cel comes and goes and now it's back on. I felt down the oil separator return hose and there was oil saturating the covering insulation. There was also oil under the ccv itself. I'm going to order ccv and 4 hoses to change the ccv hoses in hopes it cures my cel blues. I have NJ state inspection for emissions due by end of June! Anyone in nj that can do it please let me me know. I pay for labor!

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Rill in the ville!
2006 x5 e53 3.0i