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2021 Santa Fe Transmission Control System Error

14K views 30 replies 11 participants last post by  vannostrand74  
#1 ·
Has anyone experienced a failure and message reading possible condition with Transmission Control System? I'm at 26k on a 2021 Santa Fe Calligraphy. More recently I have started experiencing an issue where I start the vehicle and switch in drive only the vehicle will not go. I switch to reverse, same thing. I power it off and on and then it will work. I received a message on my display that read possible issue with Transmission Control System. I took it to the dealer only to find I needed an appt that wasn't available for 3 weeks. This past weekend, I experienced it again only this time turning it off and on didn't work. Anytime I would give it gas, the RPM would not move. It was just idle. After about 30 mins of trying, I towed it to the dealer. Of course the vehicle went into gear by the time to truck arrived. I took the attached photos and sent to the dealer. They said they've never seen that before but they run diagnostics. Ran tests, no issues and test drove, all "checks out". Ready for pick up. I travel for work so I'm nervous that I'm going to get stranded out of town. Anyone else experience this issue?
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#6 ·
I'm not 100% on when the build date was. I got it in January 23, 2021 fresh off the truck, not sure how soon they roll them to the dealer after manufacture is complete.... It's back at the dealer. I picked it up on 7/30 and the next day, I was driving about 45-50 mph on a straight road and I felt it stop accelerating. Sure enough I came to a rolling stop. Same message about Transmission Control Module popped up on display and check engine light came on dash. I turned it off and on again. Check engine light remained but I was able to get it in gear and drive it home. I'm waiting to see what they tell me this time.
 
#3 ·
There are quiet a few threads on the same issue. Here are few that i could find -






Goodluck.
 
#8 ·
Update: It's back at the dealer. I picked it up on 7/30 and the next day, I was driving about 45-50 mph on a straight road and I felt it stop accelerating. Sure enough I came to a rolling stop. Same message about Transmission Control System popped up on display and check engine light came on dash. I turned it off and on again. Check engine light remained, but I was able to get it in gear and drive it home. I'm waiting to see what they tell me this time.
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#10 ·
I just posted in another thread, "2022 Santa Fe Cali transmission failure at 7500 miles" - our 2022 Santa Fe Limited with less than 5700 miles rolled to a stop on 08/02/22.. I am still waiting for the towed-to-dealership (not of my choice) to call me. They have had it for 2 1/2 days now. After all I have read here today - I will not be surprised in the least bit with their conclusion. I am sure I will be informed that parts are not available. Hey, that's, OK. . In fact, I hope it sits for more than 30 days where I can start Lemon Law process in Alabama and get a vehicle with a torque convertor transmission. Those that are experiencing this need to read what forum user Magneto has done (In thread I previously mentioned) regarding his experience with this issue. I wish we had our 2015 SF Sport 2.0T back. Never a minutes worth of trouble and only 57K miles when we traded it.
 
#13 ·
Yes, In my opinion - both of us made a bad decision buying ANY with car with a Dual Clutch transmission. After reading up on what exactly is a DCT - and also watching several YouTube videos on the subject - I know I screwed up. Its a bad time anytime for this to occur - but especially now with worldwide COVID up and down causing low inventory of cars, chip shortage used by car manufacturers , low inventory of parts Watch the video below. - and draw your own conclusion. I feel we bought a car with a transmission that is troublesome and will cost a lot to be repaired. I realize, we have one of the best factory warranties on the road, and the drivetrain is warranted for 10 years or 100K miles. Never less, (#1), I will never trust the car again for any road trip out of town. (#2), If is repaired before 30 days, I am going to get rid of it before word gets out how bad the DCT in Santa Fe's are - and the value plummets, ( #3), If it sits for over 30 days awaiting parts - I will start Lemon Law in Alabama. . I have simply read too many here on this forum, other forums and YouTube. In conclusion, I am not a Hyundai expert and do not know what all models this particular DCT goes in. I have only searched for 2021-2022 Hyundai DCT issues.
 
#15 ·
Yes, In my opinion - both of us made a bad decision buying ANY with car with a Dual Clutch transmission.
I don't fully agree with that statement, just like the annoying guy on the video said (they belong on sports/race cars IMO), but definitely agree a DCT shouldn't be on a freaking Santa Fe. I know what DCTs are, and have owned several (a GTR, a Porsche, etc), but I was really surprised to find it on a SF. Thing is I didn't find ANYTHING remotely close in comfort, performance, size, etc., than the SF Calligraphy I bought (after selling the too big 2021 Palisade Calligraphy), so I knew what I was getting into. At that time, I only found issues on 2021s, so assumed (wrongly) that Hyundai had whatever was wrong with those units under control. Even passed on an earlier SF that had a recall for the turbo oil line, because I didn't want a dealer to mess with a brand new vehicle even before putting my hands on it. So waited for one built after 3/27, which was the date the recall was issued. Waited a month for my April 09 built unit, hoping I'd never have an issue with it. But after hearing of TWO 2022s already with tranny issues, I'm not sure it'll be a keeper, but really hope it doesn't crap out before this COVID stage of supply chain issues is over. We'll see, I guess.
 
#14 ·
DCTs in Porsches have proven quite reliable, but I got rid of mine early on, so couldn't tell, other than it was A LOT more refined and sophisticated than the SF unit for sure. I like the quirkiness of the DCT on the SF, and I'm happy and accepting how it works, but I'm REALLY troubled now by the apparent lack of reliability. I bought the SF for long trips with the family, and something like this would be a royal disaster for us. It's probably too late to do anything about our 5K-mile trip in September, which will put us around 6K miles total (900 now), so hopefully it'll be able to take it. But after that, will evaluate the situation, and decide if I should get rid of it or not. Contrary to the Palisade I sold at an actual profit (with taxes and everything), I doubt it'd be the case with the SF, even though I bought it at MSRP. I REALLY like it, but need something reliable. Is the Nissan Pathfinder with the 9-sp tranny larger, or about the same size? I don't want a Palisade-sized vehicle again.
 
#18 ·
Seems to be that there were a lot more failures in 2021, so Hyundai should know what was wrong with those trannies. I really hope they did something about it, and these 2 unfortunate examples were just isolated incidents, but guess time will tell if that's the case or not. The only thing we owners could do is check fluid levels (yes, it's plural, due to 2 fluid chambers) to make sure they're correct. Nothing else we can do, except not to abuse it, like towing more than the allowed limit, etc. At any rate, if somebody has the service manual procedure to do that, please post it. I remember reading something about that when I was doing my research, but it was related to 2021 failures. I think one of the wheels needed to get removed to reach one of the fill plugs, via a very long extension, but not sure of that.
 
#19 ·
Update: I had to go down to the dealer in person after several failed attempts to get them on the phone or respond to my emails. They confirmed what I had been saying along. The transmission is bad and now I need A NEW TRANSMISSION. Looking at a month to a month and half for the repair. What a mess.
 
#20 ·
Sorry about the transmission. Looks like you might have fallen in the suspect range as it's an early 21.

As for the dealers, I also agree, trying to get anyone on the phone or email is a pipe dream. Just show up in their face, and they have to handle you then and there.
 
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#21 ·
I really want to know what the heck is failing on those trannies. They don't even shift quickly, so it wouldn't make sense they're destroying themselves while shifting (2 gears engaging at the same time briefly). Plus a 'bang' would be audible (and possibly felt as well). Or something is really messed up in the design. The reason Hyundai is using DCTs in a freaking family SUV might be a hint that they're cutting corners somewhere, to make them cheaper to manufacture. But I still can't see how they can be cheaper than a much more reliable and proven 8-sp TC unit. I'm really baffled by that decision. And the tons of issues reported by 1.6T DCT-7 owners, wonder why they decided it was a good idea to keep using them. Ha ha. Oh well. I like the quirkiness of my DCT-8, but with no answers of what could be going on, and if only certain batches, is hard to feel safe on a long trip. I use the paddles quite a bit, so hope that lessens the chances of it crapping out. I don't keep my vehicles for very long, but was planning to keep this one more than usual, which is about 30K miles (maybe 50K). What is troubling is there's absolutely no freaking warning at all that things might be deteriorating in there; just sudden failure. I'd keep driving as much as I could looking for a dealer, but based on evidence here, it's clear I wouldn't get too far, let along being able to finish a trip. Crossing fingers I got a new one. By the way, I'm not going to abuse this thing at all, and not even get close to WOT, unless I absolutely have to. Hopefully we'll learn more about what's going on in the near future. The sad thing is there isn't anything in the market I'd choose if I got rid of this thing. I'd reluctantly look at the Nissan Pathfinder, now that they put a proper 9-sp tranny in that thing, and it's still NA (no turbos), but it's a bit larger, more like a Palisade competitor. But will keep it for now. Have a 5K-mile trip coming in 3 weeks, so crossing fingers.
 
#26 ·
Run, don't walk (as they say) to your Hyundai repair center and get the recall to fix transmission issues done ASAP!!
My 2021 Santa Fe Calligraphy was lurching into reverse and there were other clunky downshifts...all in all not working correctly. Today, September 9th, the dealership flashed a recall fix for the transmission problem. Now I have a slow, silky move out when I shift into reverse. Also shifting into Drive, the departure seems better.
Good luck!
 
#29 ·
I had the same problem. Called Hyundai Roadside Service for tow and waited 5 1/2 hours. Finally called local tow service and had to pay out of pocket for tow to dealership. Initially told that software needed an update and now everything fine. Picked up car and while driving home, I had the same problem again. Limped back to dealer and two days later told that I needed a new transmission. Still waiting on that. Now recall notice # 236 comes out ( about high pressure oil pump.) I don't want to pick up my car until everything is fixed.
 
#30 ·
I don't blame you, but it might take weeks, or even months to get it fixed. Hyundai still has to decide what the heck to do with all affected vehicles. But they should give priority to broken ones like yours, and replace the transmission, since that was exactly what they were doing before the recall. Good luck. By the way, mine barely clear the recall, but I'm still a bit concerned it might get included later, like is often the case. But we'll see. I'm not using it until maybe Thanksgiving, but for sure Christmas (it's our travel vehicle).
 
#31 ·
Has anyone experienced a failure and message reading possible condition with Transmission Control System? I'm at 26k on a 2021 Santa Fe Calligraphy. More recently I have started experiencing an issue where I start the vehicle and switch in drive only the vehicle will not go. I switch to reverse, same thing. I power it off and on and then it will work. I received a message on my display that read possible issue with Transmission Control System. I took it to the dealer only to find I needed an appt that wasn't available for 3 weeks. This past weekend, I experienced it again only this time turning it off and on didn't work. Anytime I would give it gas, the RPM would not move. It was just idle. After about 30 mins of trying, I towed it to the dealer. Of course the vehicle went into gear by the time to truck arrived. I took the attached photos and sent to the dealer. They said they've never seen that before but they run diagnostics. Ran tests, no issues and test drove, all "checks out". Ready for pick up. I travel for work so I'm nervous that I'm going to get stranded out of town. Anyone else experience this issue? View attachment 473422
I have a 2023 kona that just stopped working. 2x the acceleration stopped working while driving in the last month and worked after turning it off and on. Had an appt to get it looked at then driving home from Delaware heard a pop and the transmission control systems notice just like yours came up except for me it stopped working 100% on the highway waiting for a tow as I type this. Only 6600 miles on the car ://