How A Little Lab In West Virginia Caught Volkswagen's Big Cheat Arvind Thiruvengadam and colleagues at WVU got excited when they won a grant in 2012 to test emissions on a few diesel cars. He figured the data might result in some papers a few people might read.

How A Little Lab In West Virginia Caught Volkswagen's Big Cheat

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And now this job listing. Volkswagen needs a new CEO, somebody good at managing a crisis. The top executive has resigned. He quit after the company was caught hacking its own cars' computer software to make the cars seem less polluting. This morning, we have the story of the scientists who brought this global company to its knees. Here's NPR's Sonari Glinton.

SONARI GLINTON, BYLINE: Let's meet Arvind Thiruvengadam. He's a research assistant professor at West Virginia University. Thiruvengadam and his colleagues test and experiment on cars and engines. He admits his is not the sexiest lab on campus. But he says he got super excited when they won a grant to test a few diesel cars.

ARVIND THIRUVENGADAM: Our happiness was, wow, you know, we are going to be one of the first guys to test diesel cars on the road. And then after that, when we were getting the data, we were like, OK, you know, we're going to write a lot of journal papers. And we'll be happy if three people read these journal papers. And, you know, that's our happiness at that point.

GLINTON: The International Council on Clean Transportation is a nonprofit that tries to provide independent science to government agencies that regulate the environment. It hired the university to do a standard emissions test on diesel cars in the U.S. Volkswagen had been hyping diesel cars that are environmentally friendly and fuel efficient. Volkswagen had the boldest claims and the highest sales. But Thiruvengadam tested two VW cars, and the claims of low emissions never panned out in the real world.

THIRUVENGADAM: We were never seeing those low emissions during most parts of our drives on the interstate. You know, that part of the emissions program was in interesting.

GLINTON: In none of their road tests could they get their two Volkswagen cars to meet the claims, even though a BMW they tested did fine. Very early on, it was pretty clear to the scientists that something was wrong.

THIRUVENGADAM: One, doubting ourselves in our procedures and making sure that - double checking that we were correct and we're not doing anything wrong. And then, I mean, it just happened - it also happened that we did so much of testing that, you know, we couldn't repeatedly be doing the same mistake again and again.

GLINTON: Volkswagen was cheating. That's what everyone in the project began to suspect but wouldn't dare to say out loud.

JOHN GERMAN: It's the sort of thing you just don't go around accusing companies of doing unless you're absolutely sure.

GLINTON: That's John German. He's with the group that commissioned the test. He immediately suspected that Volkswagen had done something not completely unheard of in the car business, install what's called a defeat device.

GERMAN: The quick definition is something that tells the computer when you're on the official test cycle and when you're not. And when you're not, you change how the emission control system works.

GLINTON: German says the deceit doesn't just stop with the programmer writing code.

GERMAN: It's both writing the code - but you also need to do validation, you know? So someone had to take these vehicles out, test them on the standard test cycle, make sure that the emission controls were working when they're supposed to be working.

GLINTON: German's group eventually turned their data over to the U.S. He says things like this start with one little lie or a cheat at a time.

GERMAN: You take a little step. You don't get caught, so you take another little step. And it's like - and then - and maybe you don't even realize how far over the line you are.

GLINTON: Do you feel vindicated?

GERMAN: I think vindicated's the wrong word. I feel satisfaction that we have contributed to something that will have a major impact on public health. But yeah, the vindication implies that we are out to get somebody. And we weren't. We had no idea that this was out there.

GLINTON: The question now for investigators and prosecutors from Korea to Germany to the U.S. is how many people at Volkswagen knew and how far up that knowledge went. Sonari Glinton, NPR News.

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