An investigation into over 411,000 Ford and Lincoln SUVs and pickup trucks that had a potential engine defect that caused the vehicles to lose power has been closed, the National Highway Traffic Safety Administration announced in a report Monday.

The National Highway Transportation Administration (NHTSA) has wrapped up an investigation into more than Ford 411,000 vehicles with engines that may fail.

U.S. auto safety regulators have ended an investigation into Ford engine failures after the company replaced engines or extended the warranty on some vehicles.

The U.S. government’s auto safety regulator has ended a 2 1/2-year investigation into Ford engine failures after the company replaced engines or extended the warranty on some vehicles. The National Highway Traffic Safety Administration says in documents posted Monday on its website that its analysis traced the problem to intake valves that can fracture inside some 2.