DETROIT (CBSDFW.COM/AP) — After a series of reports, the National Highway Traffic Safety Administration is investigating whether or not a Ford truck tailgate recall actually fixed the problem.

Safety regulators say they have 11 complaints that a recall of power tailgates on 300,000 Super Duty pickups failed to rectify the issue. The agency says it also has received reports from Ford about unintended tailgate openings after the recall repairs were made.

READ MORE: Mother's Boyfriend Charged With Capital Murder Of 2 Teenaged Brothers In North Richland Hills

2017 Ford F250 SRW 4X4 Crew Cab on display at Annual Chicago Auto Show. (credit: Raymond Boyd/Getty Images)

Ford recalled the F-250, F-350 and F-450 trucks in 2019 because the power tailgates could open while being driven. The defect allowed for the potential of unrestrained cargo tumbling from vehicles. The trucks are from the 2017 through 2020 model years.

READ MORE: Dallas Police Searching For Animal Cruelty Suspect Who Shot Pitbull-Type Dog

The agency says it will investigate how often the problem happens and what the safety consequences are. The probe could lead to another recall.

(© Copyright 2021 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)

MORE NEWS: BNSF Railroad Unions Can't Strike Over New Attendance Policy, Federal Judge Rules