Audi Q5 TPMS fault

[Patrick Watson]

I have recently upgraded my 19 inch wheels to 20 inch wheels and on pressing the start button I frequently get the TPMS fault light showing. I have checked my tyre pressures which are remain constant, re-stored the pressure in the computer and drive away. The light stays off during a journey but reappears again on start up. There appears to be a fault being identified when the car carries out the start up calibration check as this is the only time two fault light appears. Do the 20 inch wheels needing coding to the car or is there another fault maybe ride height sensor or ABS sensor. Any advise would be appreciated.