One problem related to transmission sensor has been reported for the 2012 Hyundai Veloster. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Hyundai Veloster based on all problems reported for the 2012 Veloster.
Vehicle was traveling on highway when loss of poer to the pedal occured and drive symbols began flashing with loss of power in acceleration and slipping gears completetly skipping 2,3, and 6 gear. Stopped vehicle and realized there was also no reverse. Had vehicle told to dealer and was told it was a computer glitch. Issue resolved itself. Started driving on highway again and issue returned. Took to different dealship and was told it was a transmission sensor switch which was not covered by warranty and costed at least 800$ to repair. But. There are several sites that occur with this issue on multiple vehicles.