2021 Hyundai Kona Power Train

The contact owns a 2021 Hyundai Kona. The contact stated that while driving at an undisclosed speed, the vehicle downshifted unintendedly. The check engine warning light illuminated. The vehicle was able to restart; however, the failure recurred while driving. The vehicle was taken to an independent mechanic, where it was diagnosed that the transmission piston ring had failed. The mechanic determined that the transmission needed to be replaced. The vehicle was not repaired. The dealer was not contacted. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 96,000.

Transmission has hard shift sometimes, and disengages in other times. It's very irratic.

* The 7 speed DCT transmission (automatic) jerks and down shifts hard and lunges forward when braking and coming to a stop. Upon acceleration the transmission also is jerky in first gear. It's like driving a manual transmission for the first time. * If not properly controlled by braking, I could hit the car in front of me. * I have had the vehicle in twice to the Hyundai dealership, but they say the judder not bad enough to replace the transmission. They also did a software update that did not change anything. There is a Hyundai Technical Service Bulletin #22-AT-007H * There were no warning lights or messages to indicate the problem. The vehicle currently has 35,200 miles. I noticed the bad shifting at about 12,000 miles and it has gotten worse.

After Stopping for a traffic sign, I proceeded to go forward when a loud noise occurred ( grinding of gears), I loss power to move forward. A car in back of me had to apply his brakes to avoid hitting me. I pulled over to the curb and parked. Upon starting up again, I did not have full power to accelerate. I also could not put the car in reverse. About 10 minutes later, I received a message on the car information screen “ A possible condition with your Transmission Control System has been detected with your 2021 Kona” “ A full system check is recommended to be done soon”. I then drove it to a Dealership where it is now.

When you press on the gas, many times there is a very delayed reaction for power. This resulted in my safety put at risk. I have mentioned this to mechanic, they say it is the transmission. I see where there was a recall for 'automatic transmission that may disengage when the car is being driven'. This is NHTSA campaign number 22V746000. and Hyundai's number for this recall is 236. I would like to know if my car should be included in the 236.

The car has never been good on gas or changing gears when drive mode was changed to sport from the beginning. It would say 200 miles to drive I will drive 30 miles and it will go down to 130. Recently the engine light has come on the car stalls when going a very low speeds and appears to have problems changing gears. Now I am receiving a crankshaft position camshaft powertrain system code P0017. Not even a year old 28k miles. I understand there are recalls on this make model and year yet my VIN is not registered.

While driving up a steep mountain road in heavy traffic and snow the transmission on my Hyundai Kona overheated and failed. The car began to buck back and forth and a transmission light came on. Unfortunately I was on a mountain interstate in heavy traffic with no real shoulder due to snow. I attempted to limp the car to the top but moved towards the right lane in case. The transmission did it's bucking thing 3 times total and then I noticed smoke coming from the powertrain area. At this point I pulled over and put my car basically into a snow bank so as not to get run over by semi trucks. I called AAA but was able to get the car up the hill after letting the transmission cool for around an hour. This entire situation was completely unsafe and had I been informed I would not have purchased the car because I know that I spend most of the winter in traffic on a mountain interstate. What's even more concerning, this issue is documented heavily online yet the sales reps for Hyundai are not aware. The service department is aware and told me that they couldn't do anything because it was working as it is designed. See here an additional forum which outlines the same issue for another driver. https://www.hyundaikonaforum.com/threads/dct-shifting-annoyances.2428/ Best, Greg