TPMS warning light intermittent for no apparent reason
 

Mazda 3 2016 (66) model mileage 29500 The TPMS gauge comes on and off regularly. Checked tyres and to be sure replaced new front tyres, still not cured . Pressures checked 3x garage to no avail. However the warning light does not respond to the reset button which seems to have stopped working. The warning light goes out when pressing the INFO button on steering wheel but come back on after some 2-300yards Sometimes self cotrrects but comes back on Tyre garage checked using box(?) and said he had reset the buttons, but again to no avail. Could this be a sensor? there was a mention that the Abs was not in sync with gauge(all a bit above an 87 year old..)
Earliest MAZDA appointment some weeks and some considerable distance. Any suggestions. JS