I have an '08 CaymanS with 20" wheels. I'm having a problem with my new TPMS sensors. Porsche dealership installed them and they worked briefly until I changed the air pressure from what they used. Now I can't reprogram them because of the selection of sizes is 18 or 19. Any suggestions besides going back to the dealer?

 

And if you pick 19" it doesn't register after the learning period?

 

No it doesn't. It says registration complete but the light is still on...

 

that's bazzar.

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