The investigation covers about 990,000 vehicles in the United States that were recalled in 2013 and 2014, the AP said. The recall was related to computer software, which may not detect an adult in the passenger seat, resulting in the deactivation of airbags, the AP reported. The National Highway Traffic Safety Administration said 124 people have complained about the problem happening after repairs were made and said it has opened a “recall query” to assess the effectiveness of the recall fix, which was a software update, the AP said.