WASHINGTON, Nov 4 (Reuters) - The National Highway

Traffic Safety Administration said on Monday it has closed a

probe into 411,000 Ford SUVs and pickup trucks over a

potentially defective engine that could lose power without

warning.

In July 2022, the U.S. auto safety regulator opened its

investigation into Ford Bronco vehicles equipped with 2.7L

EcoBoost engines over concerns of a faulty valvetrain.

The probe was expanded later to include other models

including the Ford Edge, F-150, Explorer and Lincoln Aviator and

Nautilus vehicles with 2.7L or 3.0L EcoBoost engines from the

2021 and 2022 model years.

Under normal driving conditions and without warning,

vehicles may lose power and be unable to restart due to a faulty

valve. NHTSA said it had 1,066 unique vehicle reports of the

issue.

Earlier this year, Ford recalled 90,000 vehicles after

the automaker determined not all valves produced were defective,

and that most failures occurred in vehicles that had been in use

for a short time.

Ford's recall fix includes a dealer inspection and a

test to determine if the vehicle has not met a minimum usage

level to identify if it was equipped with defective valves.

NHTSA said the rate of reported failures related to the

faulty valve issue has steadily decreased since November 2021.

Ford said data indicates the vast majority of failures

have occurred before 20,000 miles with over half of all reported

failures occurring before 5,000 miles.

Ford said it would provide an extended warranty coverage

on the vehicles covered by the investigation for 10 years or

150,000 miles, whichever occurs earlier.

Ford shares rose 3% in trading on Monday.