The engine P0520 Code is important thing and meaning of the engine code lets you know the car engine problem and location. You can learn about the problem from the car manufacturer. If you want to learn about the car engine problem from untrusted sources, then you may learn wrong meaning or wrong things about the car engine problem. So, you will get new problems in the car engine. Once the car engine is fixed, you are allowed to drive the car but before accepting the car, you should take it for a test drive. By the test drive, you can understand about the car engine is ok or not.