Without the specific codes it is a shot in the dark. Could be:
Bad Maf
Intake Air leak
Bad AOS
Fouled throttle body
If the car is running ok, drive it until the CEL comes on again. Write down the error codes and check back. These cars are pretty easy to fix if you know where to look.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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