2018 Carbon with the OEM wheels as the "Main" set and aftermarket wheels as the "Second" set. All sensors are OEM, and have been programmed into the ECU by the stealership. I can register the Main set and get normal function using the factory service manual method of three presses on the TPMS button, however the best I can get with second set is no warning light ... even with rapidly deflating any tire. The owner manual p409 registration method 'press and hold TPMS button for three seconds' results in the warning light staying on.
Anyone else swapping wheel sets who has had similar problems and can help please? TIA
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That’s interesting coz my 2015 don’t have the feature to have a second set of wheels..

 

Seems that 2018 was a feature update year. Stealership did not think it could have two sets registered but owner handbook says yes and tech has got all 8 TPMS ID codes loaded.