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internal88
internal88, Technician
Category: Porsche
Satisfied Customers: 2528
Experience:  Over 10 years in the Import Auto industry. Engineering background and diagnostic is my specialty.
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We have code P12A2 and want to know the common fault or

Customer Question

We have code P12A2 and want to know the common fault or issue that causes it?
Submitted: 1 year ago.
Category: Porsche
Expert:  internal88 replied 1 year ago.

Hello, I'm Brandon - Porsche tech.

This codes are related to:

Issues with the crankcase pressure regulating valve and the breather system can cause a multitude of performance issues. Some examples are:
- excessive crankcase vacuum
- lean fuel trims
- sporadic misfires
- whistling sounds
- excessive oil consumption
- smoke from the tail pipe

Expert:  internal88 replied 1 year ago.

Most likely defective in the Defective Crankcase Pressure Regulating Valve.

Expert:  internal88 replied 1 year ago.

We replaced the valve cover and the issue was fixed.

Expert:  internal88 replied 1 year ago.

the valve cover also contains the cyclone oil separator.

Expert:  internal88 replied 1 year ago.

Please rate me positive for the prompt service. Thank you!