I have a Nissan Pulsar N-Tec Dig-T Xtronic 1.2 which has done 30,000 miles. In the last few weeks I have been getting a warning on screen saying “Maintenance Tyres”. This happens immediately on starting, although the sensors are not active until the car is moving. Also when the pressure sensors become effective they show correct pressures as indicated separately from the measured pressures. I can cancel this to restore the mph display I usually have and the warning does not return. There is a further display which shows all warnings, which actually says “No Warnings”. This seems to be just a computer glitch. Can you suggest any other cause? Would this be an MoT failure?