You won't hear the rattles and knocks until the damage has been done and it's too late. I recommend you find out whether you have good oil pressure or not. Either replace the sensor ASAP or get a test gauge on the oil system and find out if the oil pressure is OK.
I don't have a location for the oil pressure sensor but if you go to the dealer or a parts store they probably have the answer. Also, you will know what it looks like when you see the new one and it's probably near the oil filter.
If you want to do some research, here are two online sources for you: