Table 1 shows one common vehicle speed control related problems of the 2020 Hyundai Tucson.
| Problem Category | Number of Problems |
|---|---|
| Vehicle Speed Control problems |
When driving this car it is hard to go to higher speed. Acceleration is a huge problem. Coming on to the highway I have to wait until there's no one approaching due to the fact that it takes about 40 seconds to a minute for the car to accelerate once it comes to a stop. When switching lanes it takes 40 to 60 seconds to accelerate as well. That's not safe. God forbid someone was speeding directly behind me I would absolutely be hit. It takes to long to accelerate and get out of the way. I was nearly hit by a semi truck due to this problem. Thank goodness the truck moved to the other lane because the tuscon couldn't! also the car won't allow you to close off the outside air while if the front or rear air function. So if I want to place air on the windshield I have to breathe in the air from the person in front tailpipe. That's crazy. This is the first car I've had that did this. It's disgusting especially living in NY why should I have to breathe in that toxin. Also I can not find the third seat belt for the passengers in the back. The car is suppose to be a five passenger car however only four can safely be seated.
The contact owns a 2020 Hyundai Tucson. The contact stated while driving at various speeds, the vehicle stalled and failed to accelerate while the accelerator pedal was depressed. No warning light was illuminated. In addition, the contact stated that the a/c was blowing warm air. The contact lives in a hot climate and was concerned for the safety of her 2 minor children. The contact stated that on three separate occasions, three a/c compressors were used to attempt to repair the vehicle at a service center however, the failure persisted. The vehicle was taken to a local dealer where it was diagnosed at the owner’s expense due to the warranty being invalid. The vehicle was not repaired. Upon further investigation, the contact related the failure to NHTSA campaign number: 20v543000 (service brakes, hydraulic). The manufacturer was not made aware of the failure. The failure mileage was approximately 30,000.
Jan '22 - reported check engine light had begun to turn off and back on when gas tank was low. Feb '22 at 19k miles catalytic convertor reported failed for code (p0420), 3 way catalyst, upper and lower gaskets, and manifold all needed to be replaced - took 4 days Aug'23 called to request service for check engine light because it was coming off and on over periods of time. Scheduled for Sep'23 Sep '23 service reports new cat quoted for code p0420, I was not verbally informed by service advisor. 16 Nov '23 driving home and car starts to shake and is slow to accelerate, check engine light started to flash, car enters limp mode, could not drive safely on highway and waited hours for a tow. Codes p0420(cat convertor), p1326 (knock sensor) 25 Nov '23 picked up car, had catalytic convertor, manifold gasket, knock sensor replaced. Drove 27 miles and car check engine light begins flashing again (p1326) on freeway while merging. Car hesitates, starts to slow, had to merge over to shoulder from far left lane as car had no acceleration. I felt unsafe to exit vehicle being 9 months pregnant. Waited 2 hours for tow back to service dept the same day I picked up vehicle. 8 Feb '24- picked up car from service department. They performed engine combustion chamber cleaning and reported excessive cylinder wall scoring. Service advisor feels confident this fixed the problem. I feel unsafe driving a car that has left me stranded multiple times on busy highways and freeways, especially with children. The manufacturer keeps replacing parts and cannot seem to diagnose issue, they keep repairing problems caused by a major issue that has not been diagnosed.
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?.