About 104,000 Jeep Grand Cherokees and Ram 1500 diesels are in the crosshairs of the U.S. Government for cheating emissions. Fiat Chrysler has been accused of installing software on its 3.0-liter V6 diesel engines—which improve performance, but increase pollution. Both parties had been in talks to remedy the problem, however, according to Motor Authority, talks have broken down and a lawsuit may be pending.

Auxiliary emission control devices are legal under the Clean Air Act, yet FCA failed to show the devices were present. The EPA is claiming these devices alter vehicle performance when tested, but FCA argues the controls merely protect the engines under high-load situations. The repercussions, after the breakdown in talks, could result in fines of up to $44,539 per affected vehicle. FCA claims a simple ECU (electronic control unit) flash will fix the controls, but the feds are looking for more.