Hi all..low oil pressure light came on other day whilst about to set off from traffic lights in my 147 1.6 T Spark..looking back I'm thinking that I nearly stalled it.It went out after about 2 seconds..oil was fully topped up day before,no overheating and no nasty noises..hasnt come on again since.Is it because I nearly stalled or should I have the switch changed..and where is the switch..might give it a clean or may replace...any advice would be appreciated..thanks