Photo courtesy of Volkswagen.

Photo courtesy of Volkswagen.

Volkswagen engineers installed cheat software in their U.S. diesel vehicles because they "quite simply could not find a way to meet the tougher" standards limiting nitrogen oxide pollutants, the company's chairman told reporters this week.

"We are not talking about a one-off mistake, but a whole chain of mistakes," Hans-Dieter Potsch said at a Dec. 10 press conference in Germany that was live-streamed online and translated into English, reports USA Today.

The company has suspended nine engineers in connection with the diesel manipulation. The press conference provided an update to Volkswagen AG's internal investigation that's being led by global law firm Jones Day.

Originally posted on Automotive Fleet