The Environmental Protection Agency is issuing a notice of violation of the Clean Air Act to Volkswagen, alleging that four-cylinder Volkswagen and Audi diesel cars from model years 2009-2015 include software that circumvents EPA emissions standards.
California is separately issuing a regulatory letter to Volkswagen, and the EPA and California Air Resources Board have both initiated investigations based on Volkswagen’s alleged actions.
“Using a defeat device in cars to evade clean air standards is illegal and a threat to public health,” said Cynthia Giles, EPA’s assistant administrator for the Office of Enforcement and Compliance Assurance. “Working closely with the California Air Resources Board, EPA is committed to making sure that all automakers play by the same rules. EPA will continue to investigate these very serious matters.”