Got into volvo--it started-then it bucked lightly and stalled out--did it 3 or 4 times-as I was trying to move it to side of road---Then, it just turned over--oil light came on and it said low oil pressure--just had oil change--

Towed the girl home and now it won't turn over at all--Is it an oil pressure sensor? Fuel Pump?? HELP NOW-I have a certifed mechanic working on it--however, he is not a volvo expert--Please reply asap!!!Thank you---ann

 

I don't want to tell a certifed mechanic how to do his job but if it was me I would check the fuel pressure, and oil pressure.
This might be the cause tho...
There has been write ups about oil sludge build up in the engine and after an oil change that sludge breaks loose and plugs things up causing low oil pressure.