The EPA has issued a "notice of violation" against Fiat Chrysler Automobiles, alleging that its turbocharged 3.0-liter V-6 EcoDiesel engine used in 2014-16 Ram 1500 pickup trucks and Jeep Grand Cherokee SUVs may have auxiliary software that can alter the emissions in a way not fully disclosed by the automaker. And by failing to disclose this software and selling the vehicle in the U.S., FCA may have violated Clean Air Act. FCA is the parent company of Ram, Jeep and several other brands.
Not long ago, a class-action lawsuit was brought against FCA and Cummins Inc., accusing of them of similar charges. That suit targets Ram heavy-duty pickups only. Cummins denied the allegations and even threatened to countersue.
We've driven quite a few versions of the Ram 1500 EcoDiesel, most recently in our Texas Truck Showdown 2016. During that Challenge, the EcoDiesel actually got better fuel economy when driving around Houston near its maximum payload.
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Cars.com image by Evan Sears