The suit, which seeks class-action status, adds Ford to the growing list of companies facing claims of cheating on diesel emissions testing.
"All Ford vehicles, including those with diesel engines, comply with all U.S. EPA and CARB emissions regulations", Barbosa said. A defeat device is software created to fool emissions tests by allowing a vehicle to boost its performance, but pollute substantially more in real-world driving.
The lawsuit, submitted in U.S. District Court for the Eastern District of MI, also named German auto provider Robert Bosch GmbH as an offender. "We will defend ourselves against these baseless claims".
Ford truck owners filed a lawsuit against the auto company Wednesday claiming it rigged thousands of trucks to beat emissions tests.
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Ben Marter, a spokesman for Durbin, did not provide details of the conversation but said the senator was "encouraged" by Trump's reaction.
Hagens Berman has handled similar cases against Fiat Chrysler, Mercedes, General Motors and Volkswagen, whose lawsuit also named Bosch.
Bosch is also accused of developing software that enabled Ford to adjust fuel levels, exhaust gas re-circulation, air pressure and urea injection rates while being tested for emissions by regulators including the Environmental Protection Agency and California Air Resources Board. Although the complaint says that Ford and tech partner Bosch worked in tandem to create a system that would hide the real-life emissions in order to maintain the performance promised to vehicle users.
In a statement Wednesday, Bosch said allegations against the company "remain the subject of investigations and civil litigation" and it takes allegations of diesel software manipulation "very seriously". "As a matter of policy, and due to the sensitive legal nature of these matters, Bosch will not comment further concerning matters under investigation and in litigation".
This lawsuit presents Ford as the latest automaker to come under fire for diesel emissions issues following Volkswagen AG's infamous "diesel-gate" in 2015.