Check Engine Light and Transmission Won't Shift Correctly on Hyundai Elantra

If the automatic transmission does not shift properly and the Check Engine Light illuminates, the speed sensors in the transmission may have failed. The sensors are simple and inexpensive to replace.

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Average mileage: 100,589 (5,000–224,000)
18 model years affected: 1995, 1998, 1999, 2000, more2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2015
136 people reported this problem
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Viewing 1 - 20 of 66 problem details
2002 Hyundai Elantra 100,000 mi,
Car has had this problem for a while now. Being a broke college student I freaked out and assumed it needed a new transmission, so I sort of swept it under the rug and kept driving while it let me. It doesn't happen all the time, seems to be the most when I'm hovering around the speeds where it would normally shift gears, especially when my speed is changing a lot (i.e. in traffic). For the most part, when it happens I pull over, wait for it to reset, and usually it works fine. Sometimes it still stays stuck when I start driving again, so I repeat the process. Eventually got myself to research it after almost a year (and driving it wayyy less than normal) and from what I've read it seems to be bad Input/Output Speed Sensors. Another thing I gathered from what I've read is that a LOT of people have had this problem. Manufacturer recall would be nice.
will not change into any other gear.The rpms shoot up and it runs sluggish, just will not go from drive to 1st or 2nd at all
Engine will rev up to 4000+ before shifting. Sometimes it will downshift at freeway speeds.
2001 Hyundai Elantra 171,000 mi,
I took car to car wash to wash engine. It started up fine went to put it in drive it was trying to start out in 2 or third gear. So i manually shifted it to first gear then 2nd etc. It slammed into the next gear. Would that be shift control module.? I hope ican fix pretty cheap. I was doing a favor for a girl friend that just had a stoke. I really dont have cash to repair thanks
2001 Hyundai Elantra 125,000 mi,
I bought the car used, it shifts hard and then stays in third gear. Turn off car, reset eng. lite and resume. Replaced input, output sensors and Idle Speed Control . Not hard to replace. Got them on Amazon.com for $126.00 and installed them myself. Problem solved.
2001 Hyundai Elantra 123,000 mi,
When I am driving 30 mph or more, I experience a suddenly movement in the car. The check engine light turns on.The rpm goes up the double. Sometimes when I shut down the car, it fix itself. But not always. When I want to accelerate from 0 mph, it seems like it is in 3rd trying to increase speed but it takes more time than usual to get correct speed.
Check engine light on Hard shifting from P-R or P-D Transmission goes into fail safe mode
2015 Hyundai Elantra 5,000 mi,
Gear din't shift the gear when the rpm on 3 , 4 and some time stuck into 4th gear then i stop the car and switch off it after few minutes it gets normal and in reverase rpm going up and car move on slowly slowly kindly guide me what is soultion Thanks
2011 Hyundai Elantra 65,800 mi,
Bought my car used (previous 1 owner) in early 2013 as soon as I was over 60000 my car started with a jerky jolting problem when the car would shift. It gradually got worse and check engine light came on. We took it to a local dealer and found it was the transmission sensor. After paying almost $700 to have this fixed we found that this is a very common problem - I'm surprised Hyundai has not recalled on this yet.
2007 Hyundai Elantra 53,800 mi,
downshifts to 3rd and stays there until a stop and restart
2004 Hyundai Elantra 50,000 mi,
Car will downshift at higher speeds, runs sluggish. Sometimes will stall at red light. Check engine light is not on, so dealership says nothing is wrong. I don't like to drive on the freeway anymore, it's frustrating.
2007 Hyundai Elantra 100,900 mi,
My car shift out of drive into 3rd gear at unknow intervals. It seems to happen after driving for about 45mins to 1 hour of time, but sometimes...you just never know. The check engine light will sometimes come on, but will reset itself after sitting for a while. I have had the shift selenoid and wiring replaced at a cost of $688.75 at a local Transmission place. It will cost me an additional $1600 if I want to rebuild the transmission as they suggest. I have been driving the car for a few weeks after having this done and it is still doing the same thing I took it to be corrected. After reading some of the articles, I am just a little leary to go ahead and just have the transmission rebuilt. It appears to me that there may be something else cheaper to explore.
2005 Hyundai Elantra 61,000 mi,
Check engine light came on and shifting problem occured. Took it in to dealer and it was sensor problem, got sensor replaced @ $290.00 (not covered by the big 100,000 mile bumper to bumper/10 year warranty).
2009 Hyundai Elantra 21,200 mi,
Took the Elantra in to the service area to be looked at for the transmission not shifting right while going down the road. Shifts hard, slams into gear, gear shifter hard to take from park to another gear. Dealership told use they never have transmission problems with the Elantra. And after talking with manager saying that something was wrong and a test drive with my husband, the manager said there is defiently wrong with the transmission. So we now have to get a brand new transmission for our year old car.
2008 Hyundai Elantra 100,000 mi,
Transmission want shift, primariy reverse. I too it back to Gossett Huyundai in Memphis. They said the transmission is out due to some comupter gadget in the transmission. They are charging me $3145.00 to repair. Is there a recall on this? If not, it should be...Thank you very much.
2001 Hyundai Elantra 170,000 mi,
I own a 2001 Hyundai Santa Fe 4x4, the tranny slips in and out of gear. After replacing the input & output sensors the problem still exists. I'm told since I now have three codes for selenoids I need to replace the TCM harness.( and possibly 3 selenoids.) what's next?
2011 Hyundai Elantra 54,000 mi,
Just yesterday, the auto transmission all of a sudden started acting up. Shifted very abruptly between 1st, 2nd and 3rd gears, however, didn't experience abrupt shifting pattern after driving vehicle for about 45 minutes in stop and go traffic, but then the check engine light came on so I drove it to the dealership. Just received a call from dealership advising an issue with the transmission mounts and sensor? In any event, fortunately the fix is still covered under manufacturers warranty. BTW, this is the first major issue I've had with this Hyundai since I bought it new about 5 years ago.
1995 Hyundai Elantra 224,000 mi,
Jerky shifting when accelerating. Cannot find the problem.
trans shifting problem 80000 mi
Tranny not shifting, Check Engine Light on. 105,873 miles. Can I change Speed Sensor and HOW ?