Code 2f52 with no check engine light?

Here is information on the code:

The fault code 2F52 in a 2012 Mini Cooper, without an accompanying check engine light, typically relates to the Mini Cooper's engine management system, specifically indicating an issue with the "Super knocking detection." This fault code is generally associated with the engine's ability to detect and manage abnormal combustion events, such as pre-ignition or knocking.

Does the engine run? We need more information to help you. If the engine runs and sounds okay, I would lean towards a bad PCM. Can you upload a video of the engine cranking over/running please?

Okay, let's swap out the knock sensor to see if that fixes it which it should. Here is the location of the sensor. Also, the sensor might just be loose, which will cause this problem as well. Check out the images (below). Let us know how it goes.

The codes will only come up when the knock cannot be controlled. Let us know after you check out the sensor.