The pressure sensors are part of the valve mechanism fitted to the original rims.
They obviously have to be in the tyre / rim to measure the pressure so you need to transfer them from the standard rims. I'm assuming you haven't moved them.
They can be adjusted with a procal or probably at a dealer, but if you air up / down then of course the Procal is the answer.
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It seemed like a good idea at the time........
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