Just one day after Volkswagen agreed to pay $4.3 billion to settle allegations over its diesel emissions cheating scheme, another major auto company is being accused by the Environmental Protection Agency for violating the Clean Air Act.

The EPA claims that Fiat Chrysler installed software that alters emission readings in over 100,000 cars and trucks. According to reports, the car company’s software resulted in increased emissions of nitrogen oxides beyond the allowances detailed in the Clean Air Act.

“The software is designed such that during the emissions tests, Fiat Chrysler’s diesel cars meet the standards that protect clean air,” EPA Assistant Administrator Cynthia Giles told NPR. “However, under some other kinds of operating conditions, including many that occur frequently during normal driving, the software directs the emissions control system to operate differently, resulting in emissions that can be much higher.”

Fiat Chrysler responded to the claims in a statement, saying “FCA US looks forward to the opportunity to meet with the EPA’s enforcement division and representatives of the new administration to demonstrate that FCA US’s emissions control strategies are properly justified and thus are not ‘defeat devices’ under applicable regulations and to resolve this matter expeditiously.”