The Environmental Protection Agency has opened an investigation into Volkswagen Group’s 3.0-liter TDI V6 engine following the automaker’s admission that it fitted its 2.0-liter TDI engine with a device designed to manipulate U.S. emissions tests.
On Friday it emerged that certain Volkswagen and Audi vehicles with VW Group’s 2.0-liter TDI four-cylinder were programmed to recognize when the car was undergoing emissions tests and self adjust certain settings to temporarily improve fuel economy. When back under normal driving, the system reverts back to the previous non-emissions compliant engine settings.
Now the EPA is looking for a similar defeat device in their 3.0-liter V6 diesel engine. If a similar device is found, it would affect even more VW and Audi owners, and would also add VW Group’s top-tier Porsche brand into the mix. The engine is currently offered in VW Touareg models as well as the Audi Q5, Q7, A6, A7 and A8 and the Porsche Cayenne.
The 3.0-liter TDI V6 engine will not be certified for use in 2016 model year VW Group vehicles until VW can prove it meets US emissions standards.