My 2007 S80, suddenly drops power and stop, this occurs intermittently, 3 times over last 24 hrs, the car will start straight away, any one advise on cause

 

best to post these in the vehicle specific boards. Typically this is electrical in nature - could be something as simple as a fuel pump relay but more info would be needed to determine the cause. Any check engine light or other indicators? Any thing else happen when the engine starts to die out? Any other odd behaviors?