WASHINGTON — The EPA has instructed Mitsubishi Motors to provide additional information regarding its U.S. vehicles after the Japanese automaker said it used fuel economy testing that did not comply with Japanese regulations for 25 years.
"The agency will also be directing the company to conduct additional coast-down testing for vehicles sold in the U.S.," the EPA said in a statement provided to Edmunds late Tuesday. "We are coordinating with the California Air Resources Board."
There is no information yet on which vehicles will be subject to additional testing, the EPA said.
A Mitsubishi spokesman did not respond immediately to a query from Edmunds asking about the EPA order.
During coast-down testing, vehicles coast to a stop from 80 mph, so regulators can check such data as aerodynamic drag and friction in the drivetrain. The data is used to program dynamometers to simulate driving on roads during lab tests.
Mitsubishi said an independent investigation committee is being established to determine if any overseas models have been subjected to the same testing procedures in Japan.
"At this point, we are not aware of any vehicles sold in the U.S. being impacted by this testing irregularity," the company said last week.
Mitsubishi stopped production and sale of its eK Wagon and the eK Space in Japan due to irregularities in fuel-consumption testing. These cars are not sold in the U.S.
These two models are also sold by Nissan Motors as the Dayz and Dayz Roox in Japan.
Edmunds says: U.S. owners of Mitsubishi vehicles do not need to take any action at this point, but must wait for federal and California regulators to finish their work.