Bimmerfest - BMW Forums - View Single Post - Loosing my head, looking to get help from community. Secondary air flow
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Old 06-03-2011, 10:36 AM
ClaussenE38 ClaussenE38 is offline
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Location: Missouri
Join Date: Jun 2011
Posts: 16
Mein Auto: 2001 BMW 740i

PVC or Ccv help keeps you from getting oil leaks, in the simple explanation. They relieve pressure from oil cover gaskets, oil pan, ect. Absolutely nothing to do with a check engine light.
You have a bad sensor that controls air fuel mixture or a vacuum leak. I would find the specifications on those sensors, check their values with ohm meter, and eliminate possibilities. A scan tool with live data should pick this issue up immediately. Mass air flow sensor is a good one to start with. Also, an e-38 model much less complicated : )
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