If all your other tests have completed, make sure the tank is between 1/4 and 3/4 full then drive it for about 15 minutes at around 55 MPH, but not over 60.
If the other tests are not complete, then you may want to do a complete OBD drive cycle.
Instructions can be found here:
https://www.smogtips.com/smog-question/4370/How-To-Perform-a-Porsche-Cayman-Drive-Cycle
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2002 Boxster Base - Arctic Silver - Tiptronic
2010 Subaru Forester
1980 Ford C-8000 Custom Cab Emergency-One Fire Truck
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"I never lose. I either win or I learn." -Nelson Mandela
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