One problem related to catalytic convertor has been reported for the 2006 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Hyundai Sonata based on all problems reported for the 2006 Sonata.
: the contact stated there was carbon monoxide infiltrating in the cabin of the vehicle causing headaches to the driver and two passengers. The contact measured 999 parts per million of carbon monoxide within the cabin. The service dealer could not find a solution for the problem.