Have you checked the oil level? Silly question but I still have to ask it. The oil level sensor is simply a level on/off switch. It is not hard to get to if you want to check it. If memory serves me correctly if the sensor is open (no continuity) then the level is low. Therefor if the level is sufficient in the oil pan then the continuity will be there. The way that you can fool the system if it annoys you too much and you don't want to change the sensor (it can't be that expensive and is not hard to change) simply unplug the connector to the sensor and put a paperclip in it and tape it up with electrical tape (barbaric if you ask me).
1992 Bonneville SSEi
White, grey Leather interior.
Tinted windows and blackouts on headlights.
Custom high flow exhaust, Everything replaceable - DONE
300 000 kms original engine, tranny 2 rebuilds.
Playboy Bunnies Embossed in Tint. Oh Yah!
Ever Seen a Polar Bear in a Snow Storm?