its a fault thrown up, usually an oil pressure sensor. Get someone onto it with a diagnostic tool (Scanner) and see what comes up. My guess as i said before, oil pressure sensor.. $40 from repco, 10 second replacement
cost me $70 with a 20% discount
ive always wondered why would they label it as service vehicle soon
Ive heard Service Vehicle Soon is a nice way of saying "have your car checked out by a mechanic soon" because of a minor fault. Same way the Power Train warning flashes up an image of a transmission - if it said Oxygen sensor stuffed you'd be like "yeh right" whatever, but when you see a little transmission flash up you start to worry its something major (and theres heaps of threads on it here about it where people have done the same), plus it makes it easier for the driver to understand if the car goes into limp home mode because of a bigger issue because "the cars indicating the transmissions stuffed", even if its something not related to the trans
I guess if you think about it, it works, just we tend to over think it because to us to Service the vehicle is to change the oil and filters.
This stuff is esentially aimed at people with less technical ability or understanding then us to pressure them into having it looked at.