Oil Pressure to Low

Hello All. I have an Audi Q3 2.0 tfsi (2011) and about a month i got problems with the oil pressure. When the car is crousing it's fine but when it comes to a Stop (idling) the car gives me an indication on the dashboard (Low Oil Pressure). I change the oil pump put a new one and every sensor but nothing.. i dont know what to do any more.. ☹️ Do anyone know anything about it???