US Investigating Power-Assisted Steering Failure Complaints in Older Ram Pickup Trucks

The Stellantis sign outside is shown at the Chrysler Technology Center in Auburn Hills, Mich., on Jan. 19, 2021. Carlos Osorio/AP Photo

DETROIT—U.S. auto safety investigators have opened a probe into reports that some older Ram 1500 pickup trucks can lose power-steering assistance with little or no warning.

The investigation by the National Highway Traffic Safety Administration covers over 1.1 million pickups from the 2013 through 2016 model years.