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I checked for faults on my 2008 957S to assist EMC2 with a question, and ended up finding some faults about which I wasn't aware.  Here's a snip of the Durametric output for the Engine Module:




Can someone please tell me what these suggest?

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P2A01 Fuel trim deviation downstream of catalytic converter, bank X


Possible fault causes
- Fault in fuel/air mixture
- Fault in exhaust pipe
- Fault in exhaust measurement
- Other faults are stored in the fault memory
P2096 Lambda correction behind catalytic converter, bank 1 - lean I rich control limit exceeded
Possible fault causes
- Leak in exhaust system between the two oxygen sensors on bank 1
- Tank vent stuck in open position
- Secondary air before intake valve
- Fault in intake camshaft
- Valve lift error
- Mechanical fault in valve drive
- Oxygen sensor ahead of catalytic converter, bank 1 faulty (old)
I would start looking for air leaks.

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Thanks, Loren.  Can you please elaborate a bit on looking for air leaks?  Are you referring to a leakdown test?

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Cayenne with air suspension has an air line, in-line filter, to clean the incoming pump air. If this filter comes off the mounting "straw" off the bank1 (passenger) air box - the P2096 code will manifest itself. 

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