One problem related to engine noise has been reported for the 2018 Hyundai Sonata. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Hyundai Sonata based on all problems reported for the 2018 Sonata.
My 2018 Sonata went to the dealer for the champaign 953 software update, for engine knock sensor enhancement . After the update was completed the car immediately went into to protection mode causing the car not to accelerate when pulling out of the dealer onto a 4 lane highway, nearly causing 4 people to injured. I have been told by the dealer and by Hyundai that they have never heard of this happing before, but there are numerous complaints about this same instance happing to people on complaint sights. Hyundai needs to male it mandatory that these cars get test driven after the updates before turning the cars back over to the owners. It has now been 3 weeks since our Sonata went in for the 953 update, we still have not received our car back, the dealer states they are waiting on a wiring harness to come in. So they are performing a software update to detect engine noise related to the knock sensor, because metal debris are coming off the internal motor parts causing failure and fires, that causes the car to go into protection mode. When a car immediately goes into protection mode after the 953 update is done, they say its a bad wiring harness picking up to much noise. Isnt that a sigh of engine wear that they want to cover up with replacing a harness that will not detect the noise. It does not take a engineer to see t. Hat this is a major cover up.