U.S. opens probe into Ram diesel trucks; engines could stall

This Feb. 15, 2018, file photo, shows Ram logo on the grill of a Ram truck on display at the Pittsburgh Auto Show. (AP Photo/Gene J. Puskar, File) This Feb. 15, 2018, file photo, shows Ram logo on the grill of a Ram truck on display at the Pittsburgh Auto Show. (AP Photo/Gene J. Puskar, File)