One problem related to power steering failed has been reported for the 2015 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Hyundai Sonata based on all problems reported for the 2015 Sonata.
Power steering motor failed. Luckily, it failed sometime between when I last drove it and when I attempted to drive it the next day. The steering was extremely difficult to manage, due to the failed motor.