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The O2 sensors are detecting a rich mixture condition and the the DME is compensating but has reached it's trim limits... as I understand it. Make sure your air filter is clean and clean or replace your MAF sensor. Then clear your codes and see if you fixed it.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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