---
title: How Do Car Companies Cheat Emissions Tests? — HIGH T3CH
url: https://hight3ch.com/how-do-car-companies-cheat-emissions-tests/
date: 2015-10-08
---

# How Do Car Companies Cheat Emissions Tests?

Recently Volkswagen was caught cheating on tests for their diesel cars. How did they do it and how much did it impact U.S. air quality?