Here's some more info from the Justice Department release: https://www.justice.gov/opa/pr/statement-attorney-general-merrick-garland-agreement-principle-cummins-settle-alleged
The company allegedly installed defeat devices on 630,000 model year 2013 to 2019 RAM 2500 and 3500 pickup truck engines. The company also allegedly installed undisclosed auxiliary emission control devices on 330,000 model year 2019 to 2023 RAM 2500 and 3500 pickup truck engines.
Which makes this quote in OP's article even more infuriating:
“The company has seen no evidence that anyone acted in bad faith and does not admit wrongdoing,” Cummins External Communications Director Jon Mills told Forbes.
Installing a cheat device is the definition of acting in bad faith!!!