Thanks lads taking it tomoz to have fault read, had it before but my mate clean the switch up and it lasted till now but now soon as I turn it on it flashes, thanks

Hi guys, I've got a disco 2 04 with the m&s fault flashing on the dash board, a this the xy switch as I have a slow puncture on my rear suspension bag and I'm wondering does the ms fault show for everything with a fault or just certain things? Thanks