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i have a Cayenne Turbo of 2006. i got now the trouble codes P2187, P2189 and P0441

the symtoms are follow is the engine is cold everything works perfect but if the engine is heating up the rpm drops during the driving back to 900 rpm. i can play with the accelaration pedal nothing happens after 3 seconds but he pick up the rpm for a short spin of 50 yards then the same happen.


had somone the any idea what it could be???



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P0441 is the vapor purge system. On my 06S theres a line next to the throttle body along the drivers side of the intake manifold that had to be replaced. Theres a good youtube video of how to do that part. I had to cut the old line to get it out as he does in that video, that rubber hose did not want to budge after that many years.


2187/9 is a oxygen sensing limitation, which could be caused by the purge solenoid/line problem, so I would definitely fix the P0441 first and see what comes back. However it could be fuel related too, fuel pumps or injectors, could also be a vacuum/PCV leak, or maybe even the gas cap and oil fill cap. 


It happens as it drops into closed loop once its warm and the Oxygen sensors see something amiss. They are not used in open loop immediately after startup, so that's why it runs normal when cold and not when warmed up.

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