1994 Saab 900 Oil pressure sensor??

Ok so what is you question. I see the pic but I don't see that is a question.

i need some trouble shooting guides , my car all the sudden had anti lock/ srs/ tcs off lights all on for week or more, plus speedometer quit then another week and driving when suddenly smoke everrywhere and all the oil dumped. when looking under hood noticed a threaded hole that was empty on top of engine appears to be oil pressure switch/sensor? would this blow out on own and why ? how do i install it without complete dismantle of car? the pic shows the threaded hole under that plug that appears to have once had somthing there?>

The sensor that is unpluged there will unscrew. I see the oil a little that is below it. Now as for the lights you will need to have it scanned to get the codes and them get me those codes and I can tell what the codes tell us.

does an oil pressure sensor suppose to be threaded in that hole?> ansd is that possibly why the oil all dumped out of car; because the oil preseeure sensor came unthreaded?

The best I can see in the pic it looks like the oil is coming from the sensor there the is unpluged the light geen one. If this isn't correct then please send me a pic that is closer up to what you are pointing at. Thanks.