One problem related to automatic transmission control module has been reported for the 2018 Hyundai Tucson. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Hyundai Tucson based on all problems reported for the 2018 Tucson.
While driving the vehicle, while accelerating the vehicle would lose power or disengage from gas pedal at 17 mph and then again at 26 mph. After about 3 miles the check engine light came on and a tcm warning appeared on the radio screen. Immediately took the car to the dealership and was turned away since I didn’t have an appointment. On my way home from the dealership I made a stop at a store. I reversed out of the parking spot with no issues. When I put the vehicle in drive, it would not accelerate. I could drive in reverse but not forward. Vehicle was towed to the dealership. Diagnostics revealed it was a failed tcm. Further research revealed this same issue occurred in 2016 models. How was this not fixed or prevented in later models?.