Based on the answers provided, the following corrections need to be made to the 3D object:

1. Create a hole that runs through the object along the Y-axis. Currently, the object only has a recess or indentation on one side, but it does not run completely through the object.

2. Ensure that the hole created by the smaller square is centered at the same point as the original square. This is currently unclear from the images provided.

3. Modify the object to resemble a pipe. Currently, the object is a solid rectangular block with a recessed area, which does not resemble a pipe. This could be achieved by ensuring the hole runs through the entire object, giving it a hollow structure.