Automatic Transmission Control Module Problems of Hyundai Santa Fe

The contact owns a 2021 Hyundai Santa Fe. The contact stated while driving 60 mph with the adaptive cruise control mode activated, the contact heard three beeping sounds, and the vehicle lost motive power. There was no warning light illuminated. The contact veered to the side of the road. The contact restarted the vehicle and continued driving. The contact stated that the vehicle made the beeping sound again while driving 50-55 mph however, the vehicle had not lost motive power. The dealer was notified of the failure and informed the contact that the vehicle was safe to drive because there was no warning light illuminated. The contact continued driving. The contact stated that upon restarting the vehicle, the powertrain control module (pcm) warning light was illuminated. The vehicle was towed to the dealer where the transmission was flushed; however, the failure reoccurred 2 weeks later while driving. The vehicle was taken back to the dealer where the transmission fluid was refilled; however, the failure persisted. The vehicle was taken back to the dealer where it was diagnosed that the transmission needed to be replaced. The vehicle was not repaired. The contact related the failure to NHTSA campaign number: 22v746000 (power train) for which the VIN was included. The manufacturer was not notified of the failure. The failure mileage was approximately 21,000.

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The weekend we purchased our 2010 Hyundai Santa Fe limited, v6, while driving in area with moderate grades vehicle had trouble shifting between 1st & 2nd gears, 2nd & 3rd gears. We thought it could be the area we were driving in, so we continued to drive it to see if that was it. It was not. Hard shifting has continued for the complete extent of our ownership commencing at the start. On 12/7/2010, took the vehicle in to be checked, cause: found transmission jerking. Module assy-auto trans control re, reset adaptive trans values. Recall, p0111, ecm update, performed camp tc7. Bring back if continues after a couple weeks. It did continue, but I am a busy person. On 4/21/2011, returned again stating that vehicle was continuing to shift hard, jerking. Dealer svc states could not duplicate. Vehicle duplicated for me on way home from svc appt. On 6/10/11, returned again for same problem with hard shifting at low speeds, jerking. Cause: tcm upgrade, re-reset adaptive trans values, after which svc dept said could not duplicate again. Svc mgr states that a new reflash had been issued since they upgraded it last on 12/7/2010. Thru research I find no new upgrade has been released on svc messages/notifications. I believe I've been mislead. I am positive that the vehicle will do this again. Also, intermittently when only cranking the vehicle and before the vehicle is put in gear it will immediately have a feeling of a large "bang or slam" and then lunge forward even though still in park. The vehicle also makes "popping" sounds when in park kind of like small "backfires". I have also asked them to investigate this and did not get a satisfactory response. They state that all of these symptoms are connected to the "new reflash" that has come out since the 12/7/2010 svc appt. It "should" fix it. I say recall it.

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My 2005 Santa Fe (Hyundai) was parked in my driveway. My 3 year old son got out of my sight for 2 seconds got into the car and put it in reverse and coasted out of my drive and across the street hitting my neighbors Ford expedition. No keys and he is too small to reach any pedals. This was almost a devastating accident, there where children riding bikes on my street and a car driving down the street . It is almost a week now and I am getting nowhere with Hyundai, and the dealer tells me they cannot do anything until Hyundai inspects the car. Since the incident, I can still put the car in any gear without keys or touching pedals. And the steering wheel is locked so you cannot steer either.

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I would like to first thank you for taking the time to review this letter. March of this year I purchased a 2004 Hyundai sante fe. I was motivated to do this based on my prior experience, as a former owner, along with the coupled knowledge of Hyundais improved warrantees. In the past I had no reason to bring a Hyundai into the shop for repairs, other than for routine maintenance. The problem Im having with my current vehicle is focused in the drive train, specifically the transmission. It has been going on for approximately 5000 miles. Initially I thought it was just a matter of breaking the car in, after which point things would start to work smoothly. The nature of the problem is as follows: when the vehicle gets warmed up the shifting, on occasion becomes jerky. Also when the vehicle is transitioned from park to drive, the initial takeoff stutters, as if the car is intermittently losing power. After the vehicle is up and running in drive, the problem goes away. It only occurs for the first 20 yards of initial takeoffs. The problems described above are intermittent. Knowing that the vehicle is covered under Hyundais warrantee, I took it in to have it looked at. Prior to this, I spoke with one of the shops managers and described my problem. He indicated to me that it was probably the transmission controller. I asked him if he had seen this problem before and his reply was yes. After the mechanic road-tested my vehicle they came to me and said they could not duplicate the problem. I said, after I leave here its going to continue to exhibit the same problems, requiring a return visit. He replied, yes. I asked if they could replace the transmission controller board. They replied that they could not just throw parts at my car in an effort to make it right.

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