Golf/GTI VI :: Error About Low Oil Pressure

So I bought my first VW as a used car. It's a 2011 GTI and already running into some problems. During the test drive at the dealership, the problem didn't occur. The car was sold as "as-is".

So on the way home from the dealership, the car threw an error about low oil pressure (I'm not sure what the wording was exactly at this time). I drove normally. I did not hit red-line or do any hard cornering on the way home. I got freaked out so I stopped, turned engine off and checked oil level. It's at the proper level.

I looked around the engine bay but nothing was obvious. I started the car up again and the code was gone so I made it all the way home. I drove around some more and now it's showing up about every 15-20 mins. Goes away and then comes back on later. The error now is "Low oil pressure. Turn engine off immediately".