A Method and System for Monitoring Tyre Pressure

A tyre pressure monitoring system 12 for a vehicle 10 has a plurality of tyres 14a, b, c and d in respective rolling locations and a spare tyre 14e generating a spare tyre identification. A controller 22 starts a timer 44 and sets a tyre status to one of a rolling status, a pending rolling status, a spare status or a pending spare status in response to the timer and the vehicle speed. The controller 22 stores the status and the spare tyre identification in a memory 26.