Engine fault codes have to conform to a standard. Manufacturers are allowed to create their own codes for some things, such as specific body functions, but there are a lot of common faults that must conform. The codes were created probably before oil condition became an issue, but any warning must be a universal code. It appears that this one has been used.
It is important with any code to not just rush to the first thought, but to use it as a pointer for proper diagnosis. If oil pressure was an issue, it would put a light on, as the switch is just that, on, or off.
If the computer has not been told about the oil change, it is still counting from the previous change, and has decided that it now will be ineffective as a lubricant. To protect the engine, it is now preventing any real performance, so needs the service/oil quality indicator resetting. However, depending how long it has been in this condition, a simple reset may not be enough. You will almost certainly need a trip to the dealer.