Last night my TPMS light came on. When I checked on the TPMS page on the insrtument cluster it was flashing on the front nearside wheel. When I started driving home, it displayed the individual pressures: front nearside 31 and the other 3 at 32. I was surprise a 1psi difference would trigger the TPMS system. This morning I went out and put some air in the low tyre but the warning remained. I then had a look through the manual to see how to reset the system but came up blank. It suggests if the pressure is up to that recommended, the warning will disappear. I checked the pressures as listed in the door jamb and was surprised it shows 36psi all round. I inflated all four tyres to 36psi but the warning remains on. Any ideas?