Hi, newb here and first time owner of a Volvo S40 and first euro car owned. It's a nice car but I do have one problem, I've noticed lately that when I make a sudden turn to the left, the engine, shuts down, electrical and everything, it's a total power loss....

I've also encountered one time just sitting at the traffic then the car just lost power again and shuts down and power comes back maybe about 3 seconds it will start and run fine.... no error code or whatsoever..... please help thanks.....

 

I'd look for a loose battery or battery cable. I'm thinking the turn lets the battery move which either shorts or loses connection somehow. Can you wiggle the battery cables with the car idling and make it happen?