One problem related to engine engine control module (ecu/ecm) has been reported for the 2018 Kia Motor Optima. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Kia Motor Optima based on all problems reported for the 2018 Optima.
The contact owns a 2018 kia Optima. The contact stated that while driving at an undisclosed speed, there was an abnormal odor and a knocking sound coming from the engine. The vehicle was taken to the dealer; however, the dealer was unable to duplicate the issue. The vehicle was not repaired. The issue persisted. The contact stated that the vehicle was later returned to the dealer to be repaired under a service campaign involving the engine control unit (ecu). Shortly after the vehicle was repaired, the ecu failure message was displayed. The vehicle subsequently became inoperable. The vehicle was not repaired. The manufacturer was notified of the issue. The approximate failure mileage was 1,500.