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DIY 2012 Cayenne Base Valve Cover replacement

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Dear Enthusiasts,

Is there a DIY for replacing the Valve Cover for the 2012 base V6 Porsche Cayennes? I had the Check Engine Light comes on with codes:

1) P050700 - Idle Control Speed Above Setpoint
2) P218700 - Bank 1 Fuel Metering System too lean at idle speed
3) P218900 - Bank 2Fuel Metering System too lean at idle speed

Also curious because the CEL showed up right after I filled up on gas. When the car is in Park, the rpms revs up and down from 1000 - 1500.

Coincidentally, the fault code P261A00 - Coolant Pump 2 Open Circuit code also showed up.
I wonder if they're related and if not why? I am told that this is the auxiliary water pump. However, I don't see my temperature rising.

Please help. I've only had the car for 2 months and am very new to the forum.

Thanks in advance.

-les grossman

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