The government has opened an investigation into possible steering problems in the 2011 Hyundai Sonata.

The National Highway Traffic Safety Administration said Tuesday it had received field reports alleging the separation of a joint that led to a complete loss of steering in the sedan or a loosening of a joint connection in the steering.

The government said the vehicles cited in the reports were manufactured during the same month and had fewer than 600 miles on them at the time.

The investigation involves an estimated 16,300 Sonatas.

Hyundai spokesman Jim Trainor says the company received two reports citing steering problems and the two vehicles were repaired. He said there have been no injuries or crashes reported and Hyundai is cooperating with the investigation.