West Virginia may be the first U.S. state to sue Volkswagen AG for deceiving car buyers after the Environmental Protection Agency said last month that the company had installed software to hide that its diesel engines exceeded pollution standards.

Attorney General Patrick Morrisey seeks restitution for Volkswagen customers, who he says paid as much as $6,855 extra for cars with the clean diesel engines, plus $5,000 in civil penalties per violation of West Virginia’s consumer protection law.

There are about 2,684 Volkswagen vehicles registered in the state that have diesel engines with the software to cheat emission tests, according to the complaint filed Friday in Kanawha County Circuit Court.

While diesel-engine vehicles with the so-called defeat device complied with U.S. and California standards in tests, the software switched off emissions controls on the road to improve performance, generating pollution at levels as much as 40 times the limit. The EPA estimates that 482,000 of the 11 million vehicles made with the device were sold in the U.S.

Volkswagen faces a criminal probe in Germany and also by the U.S. Justice Department, as well as a joint investigation by at least 45 states under environmental and consumer-protection laws. California has since started its own investigation, too.

More than 229 lawsuits — with claims for billions of dollars — have been filed as class actions in federal courts in at least 37 U.S. states. The automaker is accused by car owners of inducing them to pay more for their vehicles.

Volkswagen spokeswoman Jeannine Ginivan didn’t immediately respond to an e-mail after regular business hours Monday seeking comment on West Virginia’s lawsuit.

“West Virginia consumers responded to Volkswagen’s advertising by purchasing TDI clean diesel models, expecting that their vehicles would be environmentally friendly, fuel efficient, and high performance as advertised,” Morrisey said Monday in a statement. “Volkswagen will not be able to comply with the EPA order to make the affected vehicles comply with emissions standards without substantially degrading their performance and fuel efficiency to a level below what was advertised.”

The Texas county that includes Houston was the first government agency to sue the German carmaker. Harris County is seeking $100 million for excess pollution from the vehicles.

The case is Morrisey v. Volkswagen of America Inc., 15- C-1833, Kanawha County, West Virginia, Circuit Court.

–With assistance from Margaret Cronin Fisk in Detroit and Christie Smythe in Brooklyn.

Topics Lawsuits USA Claims Virginia Pollution West Virginia