Low oil pressure warning

[graynada]

Easing my way through the Hindhead road works on the A3 yesterday afternoon and my low oil pressure symbol appears on the DIS accompanied by 3 beeps. After the 3 beeps the DIS returned to normal.

I stopped as soon as I can and the oil level was good, ands on restart and the rest of the days driving there were no further anonalies.

Is this most likely a sensor glitch?

Is this a common fault on D2s?

Am I right in thinking that if the low oil pressure symbol on the DIS goes off, the oil pressure is OK?