I have a spare rear wheel that has the TPMS sensor. Anytime I switch wheels and use the spare the TPMS light stays on constantly. I did some research and the sensor in each wheel has to be calibrated to the TPMS on the bike.....I would guess that one of your sensors is not transmitting or the TPMS on the bike is not receiving the signal from the sensor.
I don't know how to check that, but if it is still under warranty any dealer should be able to troublshoot it for you.
I don't know how to check that, but if it is still under warranty any dealer should be able to troublshoot it for you.