On Monday, the US EPA issued a second notice of violation (NOV) of the Clean Air Act (CAA) to Volkswagen AG, Audi AG and Volkswagen Group of America, Inc., alleging emissions cheating in 3.0L diesels. EPA also issued the NOV to Porsche AG and Porsche Cars North America (PCNA). (earlier post) In response, Porsche Cars North America issued a response saying it was “surprised to learn this information.”
Until this notice, all of our information was that the Porsche Cayenne Diesel is fully compliant. Porsche Cars North America will cooperate fully with all relevant authorities.—PCNA statement
The vehicles covered by the new NOV are the diesel versions of the 2014 VW Touareg, the 2015 Porsche Cayenne, and the 2016 Audi A6 Quattro, A7 Quattro, A8, A8L, and Q5.
EPA is alleging that the vehicles contain a software defeat device—specifically, code in the electronic control module (ECM)—that results in increased NOx emissions of up to nine times EPA’s standard under certain conditions.