Adaptive Cruise Control Problems of Hyundai Tucson - part 2

Driving on highway long distance on sunny days the radar becomes blocked disabling critical forward safety functions and cruise control. Numerous times this has caused a near collision due to the automobile malfunctioning. Many times my cruise control has just stopped working and my vehicle has rapidly decreasing speed, causing people behind me to have to slam on their brakes. My vehicle has also automatically braked on the highway when there was no one in front of me. These are just two incidences that have nearly resulted in collisions on the highway. This has been occurring since I purchased the vehicle in September 2022. Unfortunately, dealership has not been able to duplicate what has occurred.

See all problems of the 2022 Hyundai Tucson 🔎.

My car was doing a shocking change of speed all of a sudden, for example I would be driving and accelerating, but the car would not speed above 40mph, and while I was still pressing on the accelerator, it would do like a shocking movement and accelerate all of sudden. Yesterday, December 8th, 2022, I was driving on the highway on the 3rd lane and while driving the call did a shocking jump and all of a sudden the speed went down to 20mph, I panic of course because all the cars where going fast, it was a nightmare for me to change lanes because I couldnt manipulate the speed of my car.

See all problems of the 2016 Hyundai Tucson 🔎.

It happened on two different occasions but only when driving at high speed using the cruise control. Here is what happened. Driving on the cruise control I “set” it to 70 mph. Driving on the two lane highway with both lanes blocked by other vehicles, I pressed the “brake” pedal. The car slowed down and I continued driving at a lower speed. When traffic in front of me cleared, I pressed the “resume” button on cruise control. With no obstacles in front of me, my car was supposed to accelerate to the previously set speed of 70 mph. Instead, it was slowing down. When pressing the gas pedal the car was not accelerating. It felt like the car “lost power. ” it felt like the automatic transmission shifted to a neutral or may be the lowest gear. Pushing the gas pedal did not do anything and on both occasions I managed to steer the car to a road shoulder. It was a scary situation with heavy fast moving traffic on a narrow mountain highway. I stopped the car, then tried to go again. It would go very slow on, what felt like, the lowest gear without acceleration. I then stopped the car again and turned off the engine. Turning the ignition off resets the electronics and I was able to get back on the road. The car continued to drive normally on cruise control until the same happened again the next day. As I said, it happened on two different occasions. From there on I avoided pushing the “resume” button on cruise control and I am afraid of using it from now on to avoid potential accidents. I consider this to be a life threatening malfunction and I reported it to Hyundai’s customer care. They opened the case number and suggested going to the nearest dealer. I took the car to the nearest dealer. They kept it for several days, drove 40 miles and, as I expected, were not able to replicate the problem. In my opinion, this problem needs to be analyzed by the engineers not a dealership's technician. Is speed a factor? is temperature a factor? what is the factor?.

See all problems of the 2020 Hyundai Tucson 🔎.