In many states, there is no requirement to show ID unless arrested. In other cases, there still has to be reasonable suspicion (the Terry standard).
Detaining someone for 1 second without reasonable suspicion violates the 4th amendment. Pulling someone over is not a consentual encounter, but the officer is probably trained to turn it into one. Extending the stop is unconstitutional. See Rodriguez v. United States, 575 U.S. 348, 135 S. Ct. 1609, 191 L. Ed. 2d 492 (2015),. I suspect that even a diminimus extension would be unconstitutional. So, a false report could be argued a civil wrong, even when causing a deminimus delay.