[Halm]

Originally Posted by sugarwood

Do you know how to work them fancy pants smartphone thingies ?

If so, you only need to spend $10. I have purchased several of these, and they work.
https://www.amazon.com/Veepeak-Bluetooth-Diagnostic-Automotive-Vehicles/dp/B011NSX27A/

Install Torque or OBD Fusion (paid) on your phone.

+1. That is what I used on my 997 and BMW 335. Reset all my CEL’s, and I am pretty sure oil change intervals. It went with the Porsche when I sold it and wil order another one now that I picked up the Boxster.