Automatic Transmission Control Module problems of the 2016 Hyundai Tucson

The transmission began slipping and hesitating within days of purchase. The vehicle intermittently fails to accelerate when pressing the gas pedal, especially when pulling into traffic or crossing intersections. This creates a serious safety risk because the vehicle does not respond when needed, leaving me exposed to oncoming traffic. The issue is intermittent and does not always trigger warning lamps or fault codes. The problem has been reproduced multiple times by me while driving under normal conditions. The selling dealer performed only a brief test drive and stated they could not duplicate the issue, but the hesitation and failure?to?accelerate continue to occur. The vehicle has not yet been inspected by Hyundai, but the symptoms match known issues with the 2016 Tucson’s dual?clutch transmission and tcm logic. There were no warning lights prior to the failure, and the symptoms first appeared within the first week of ownership. The vehicle is available for inspection upon request.

The contact owns a 2016 Hyundai Tucson. The contact stated that the check engine warning light was illuminated, and there was a ticking sound coming from the front of the vehicle. The vehicle was taken to auto zone, where a mechanic diagnosed the vehicle with a knock sensor failure. The knock sensor was replaced. The mechanic informed the contact that the vehicle was included in manufacturer campaign: cs966 for the transmission control module (tcm). The vehicle was taken to the dealer, who confirmed that the vehicle was included and the software update was performed. After the vehicle was repaired, the check engine warning light was no longer illuminated; however, approximately 30 minutes later, the vehicle failed to exceed 35 mph, and the check engine warning light started flashing. The vehicle was returned to the dealer, and the contact was informed that the software update caused the vehicle to enter limp mode to protect the engine. The dealer informed the contact to drive the vehicle for 30 days or a total of 500 -1000 miles, and if the vehicle continued to enter limp mode or failed to operate as needed, to return the vehicle for the engine to be replaced. There were no additional repairs performed. The manufacturer was not informed of the failure. The failure mileage was approximately 125,000.

A few months after purchasing the vehicle in April 2017 I took it in for service and complained about a hesitation in acceleration. I informed the dealer that the problem occurred in normal driving mode and was worse in eco mode. The dealer checked for the latest tcm update, said it had the recall update installed and said that all was ok and don't drive in eco mode. On a number of occasions since then, the vehicle continued to exhibit hesitation sporadically in regular mode, but also had a more serious fault. A number of times at busy intersections, the vehicle refused to move for a few seconds. This became a panic situation as the vehicle was momentarily "stalled" in oncoming traffic when making left turns. I reported this to the dealer service and they again checked and said the vehicle has the latest tcm update. Subsequently I have noticed that the car has occasional hesitation but have not had the more serious "refused to move" situation. Since it is a sporadic problem I have grave concern that it could happen again. The dealer advised me to call Hyundai customer service. After speaking to a customer service specialist today I received two offers; trade your car in for whatever the dealer offers with no Hyundai CO. Assistance, and information about how the dual clutch transmission works. So I am supposed to accept that I made a mistake in buying my 4th Hyundai and Hyundai made no mistake, or I am an ignorant fool who needs to educate myself. I was offered a gift card to placate myself. Really? I put myself and my family at risk for a gift card. . . This is unacceptable as Hyundai is not acknowledging their engineering and manufacturing problem and the danger that this flaw entails. If a serious accident happens as a result of this problem they will be on the hook for much more than a gift card.

10-31-2015 purchased vehicle. 10-31-2015. 3-2-2016 mileage 1691, returned vehicle back to Hyundai dealer for ecm engine control module & tcm transmission control module software updates per ty8 hard shifting complaints. 7-22-2016 campaign 145 secondary hood latch repair. 10-21-2017 campaign 149 ecm & tcm software update for dct problems. 5-2-2017 t1b ecm software update for dct problems. Software update improves transmission jerking from 0 to 15 mph. 5-21-2017 mileage 12,500, outside temp 70 deg f, stranded on interstate, transmission in drive but not vehicle not moving. Vehicle towed to dealer. Hyundai service finds faulty fuel tank pressure sensor and bad wiring harness. Replaces both. 5-23-2017 picked up vehicle and drove normal on way home. I have lost confidence in this vehicle and wished I had purchased the se model with the 6 speed conventional transmission and not the 7 speed dual clutch transmission. Time will tell if this last repair will solve the numerous dct problems.

The contact owns a 2016 Hyundai Tucson. While attempting to accelerate through an intersection at 5 mph, the vehicle failed to accelerate without warning. The vehicle was taken to a dealer where it was diagnosed that the transmission control module failed and needed to be repaired. The vehicle was repaired, but the failure recurred multiple times. The manufacturer was notified of the failure. The approximate failure mileage was 5,700.

Weeks following service at Hyundai dealer to have NHTSA campaign number 16v-628 requiring reprogramming of transmission control module, we have had 2 (two) near miss collisions due to car hesitating during turn from a stop and straight from stop sign. One; during legal left turn across 2 oncoming lanes, car started to roll than lose power while broadside to traffic. Oncoming traffic forced to stop until several complete cycles of the accelerator did get the vehicle moving again. Engine did not stop. Second at intersection from complete stop. Standard acceleration applied, vehicle started to roll (from release of brake) then stalled. Accelerator was repeatedly cycled several times before vehicle started to move. Car behind forced to stop suddenly missing rear bumper. Vehicle also had instance of a power train loss for about 1 second then sudden and powerful jolt during acceleration (estimate speed range about 40 mph) onto a highway from an on ramp. Despite service to address recall notice, vehicle shudders more during rolling starts and stops. Difficult in slow moving areas including car ferries typical to regional commute. Have taken to dealer (documented) following incident 1 and on ramp jolt. They observe the continuing shudder. They have taken vehicle for test rides but do not see the stall that is sporadic. Note, incident 2 as described above occurred approximately 1 week following service to observe this defect. Hyundai service aware of shudder and unable to resolve and conclude "they are in the hands of the engineers. " they hand out a document explaining the dual clutch system in an attempt to normalize these occurrences.

This issue has only happened while driving on a city street. As I accelerate from a standing stop the engine will rev up to match the accelerator petal but the transmission will not engage. I let off the petal and attempt to move again with not luck. I shift the vehicle into neutral then back into drive with the same results. After the third or forth attempt the vehicle will start to move slowly then accelerate rapidly as the transmission fully engages. This is a 7 month old vehicle with 13k miles and this issue was first noticed at about the 10k mark. This issue was brought to the dealers attention who informed me that this was know issue with the tuscon with the new 1. 6 turbo and 7 speed dual clutch transmission. The dealer followed the mfg advice to reset the ecm (engine control module) and the tcm (transmission control module) this was done and within 100 miles for the reset the issue was back and even worse. The vehicle is no longer safe to operate because of the randomness of the issue so the vehicle was left at the dealer on 7-26-2016 awaiting an answer from Hyundai on a permanent fix. As of 7-26-2016 no update or even acknowledgement of the issue has been received by the dealer or the owner. A complaint was filed with Hyundai on 7-23-2016 and the owner is still awaiting a call back from a representative of Hyundai America.

The contact owns a 2016 Hyundai Tucson. On several occasions, while driving, the accelerator pedal was depressed, but the vehicle failed to accelerate. The dealer was unable to duplicate the failure; however, the contact was informed that there was a transmission control module software update that may remedy the issue. The software was updated, but failed to remedy the issue. The contact stated that the failure was intermittent. The vehicle was not included in NHTSA campaign number: 16v628000 (power train, electrical system). The manufacturer was notified of the failure. The approximate failure mileage was 2,000.

Twin clutch seven speed transmission needs updating hesitates on acceleration from a start at a red light / stop sign / etc. Jerking auto & creating vibrations in driving axles had dealership install tcm sw update {15-01-050} on Jan 14 2016 still have same results on occasions help!!!!!!!!!.