All of the reports indicate that the ECUs were programmed to detect tests and enable the changes that reduce NOx emissions. The intended behaviour was to have o

All of the reports indicate that the ECUs were programmed to detect tests and enable the changes that reduce NOx emissions. The intended behaviour was to have one performance profile for emissions tests, and one for power/efficiency elsewhere. The engine shutoff feature is irrelevant, as it happens in the wild when not running emissions tests.