Volkswagen intentionally programmed their diesel engines to activate certain emissions controls only during laboratory emissions testing.

Question

Quizplus · Accepted Answer

This is known as the "defeat device" scandal, where Volkswagen intentionally programmed their diesel engines to detect when they were being tested and modify their emissions to pass the test, while emitting significantly higher levels of harmful pollutants during normal driving conditions.

Volkswagen Intentionally Programmed Their Diesel Engines to Activate Certain Emissions