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I cant find mention of the P 000A code mentioned in the OBD II codes or in the forums, so if anyone can direct me, much appreciated. 2008 Cayenne S I've been unable to shake this code, even after both cam shaft arms and sensors replaced. The shop tells me that the culprit is most likely sludge build up caused by derelict oil change routine, and the best solution is a series of 3000 mile oil changes to reduce the build up. Apparently, the death star appears if this doesnt fix and I'm pulling the engine to access an internal screen which serves as another filter, deep in the engine. Needless to say, the direction of the conversation gives me pause on several levels. 1- Oil changes on schedule 2- Why would the cam arm fault remain on after replacement and reset 3- Mechanic says 'DO NOT USE ANY OIL SYSTEM CLEANING ADDITIVES" 4- Is there really a screen deep in the bowels of the engine that can foul? If anyone has had or heard of this issue, I would appreciate some advice. Thanks, Steve