The light illuminates yellow when the ignition is in position Ⅱ. It extinguishes after a few seconds.
If the light remains on, or illuminates red when driving, a low tyre pressure is indicated. Low Tyre Pressure will appear in the message centre.
If the light illuminates yellow a fault with the system is indicated. Tyre Pressure System Fail will appear in the message centre. Adjust your tyre pressures or seek an MG Authorised Repairer.