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

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: 139,579 (28,100–269,762)
Drive Train affected: Automatic Transmission
10 model years affected: 1999, 2000, 2001, 2002, more2003, 2004, 2005, 2006, 2007, 2009
44 people reported this problem
27 people shared problem details
My car drives from my house to the stop sign. It stops rough. When I put my foot on the gas it moves slow and it whines then jerks. I have to keep pulling over to make it stop. It keeps jerking and the car has stopped running. I just had the input and output speed senors replaced and I also replaced the throttle position senor. Is there anything I can do to find out if the transmission just need service or do I need to replace it. Yesterday I smelt some burned. It was only brief.
2001 Hyundai Sonata125,000
The transmission seems to be stuck in third gear sometime ,the jerks and engine light comes on
2006 Hyundai Sonata220,000
want change out of 3rd gear want go in reverse service light on.
2004 Hyundai Sonata42,000
The check engine light stays on and the transmission does not shift properly.
Transmission will not shift, not sure what the issue is.
Not fixed yet but 65 mph and gear slipped to 3rd and wouldn't shift back up. The error codes generated were P1529 and P0720, I'm hoping to replace the Output Speed Sensor and hope that helps.
Transmission won't shift gears/CEL on
2006 Hyundai Sonata104,000
No reverse, stuck in 3 rd gear. Replaced speed sensors still no reverse, drove OK for a mile stuck in 3rd again.
2000 Hyundai Sonata115,000
Cold Start it shifts OK and I can drive around for hours till I turn off car then it sticks in second till I shut it down & it cools completely.
2009 Hyundai Sonata- Automatic Transmission204,000
when i drive above 20 mph and then come to a stop when the tranny is coming down from gears and right on 20 mph it makes a sudden stop. Does anyone know what would cause this on the tranny, im thinking that its either the input or output tranny sensors.
2004 Hyundai Sonata222,650
Car over heated. Rt/Rr wheel bearing went bad. Check engine light came on. Had wheel bearing replaced. Pulled thermostat. Check engine stayed on. Drove car and now stuck in 3rd gear. Drove 160 miles to get car home. Car engine ran perfectly. Didn't over heat. Upon breaking at low speed (~ 15 mph) car jerked and felt like it trying to slip into reverse. (Felt like the brakes had locked up). This happened only once during the entire trip. Car moderately jerks when shifting from park to reverse or into drive. The slower I shift, the less the jerk. Haven't had the car diagnosed yet.
2003 Hyundai Sonata144,000
Engine won't shift right, after start reverse wont go automatically i have to rev it higher then 3k rpms till it jerks into it. Same thing with drive. Also will drive for 2-5 seconds then skips straight to 3k rpms then keeps kicking in and out of drive.
Check engine light on transmission shift hard when coming out of reverse what change gears has plenty of fuild did it once before sit a couple of days then drove it was ok but started again
Same problem sometimes slow acceleration and Jenks down shifting
2006 Hyundai Sonata208,567
My 2006 Hyundai sonato V6 3.3L will not move in reverse gear and the check engine light has now came on shortly after, acceleration power is slow...I recently replaced the brake switch..what is the problem now? Is the transmission bad? I have fluid .
1999 Hyundai Sonata102,567
it stays in high gear and has no power reverse gear has lots of power
2003 Hyundai Sonata140,000
Transmission is slipping and won't go into drive.
2002 Hyundai Sonata163,211
Was driving and heard a click, car is stuck in 3rd gear.
2002 Hyundai Sonata163,432
My car is shifting very roughly and I changed the fluid but nothing happend. I also can buy a filter for it.
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