Hi, I have an 09 plate mini cooper S, recently had my run flats replaced with standard tyres for an improved drive which has worked really well however I am having issues with the tyre pressure warning light. It was reset at the time but comes back on almost every time I drive. Unlike when I have had a flat tyre previously with the run flats, it does not require reseting to get rid of it, when I restart the car it has gone but then may come back on a day or so later. Taken it back to the garage who have checked for faults by running a diagnostic but nothing has shown up, they have reset it again but it continues to happen. Now that I don't have run flats and obviously don't have a spare wheel, I need to be able to rely on the warning light. Can anyone help?