One problem related to battery propulsion system has been reported for the 2011 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Hyundai Sonata based on all problems reported for the 2011 Sonata.
While driving, a warning alert suddenly sounded with a display advising "check charging system. " the power system in the car failed. The air conditioning cut off. The acceleration system failed completely and the car cut off all propulsion. I pulled over and had to turn off the ignition. I pushed the start button again and the car appeared to work. I have read online that this is happening to all Sonata hybrids.