P1000 is information only. It is not a problem or fault.
It cannot be cleared other then by driving the car.
The code is set each and every time you disconnect the battery or clear the codes using a scanner.
It only tells you that some internal checks are not completed yet. These checks are required by law and can only be done with the engine running.
So, no problem at all, just use the car and the fault code will disappear.