Software Update Available Which May Correct Transmission Issues on Kia Sedona

Reprogramming the transmission control module with the latest Kia transmission software may fix abnormalities in the automatic transmission and erroneous transmission-related Check Engine Light illumination. Software updates are commonly most effective on newer vehicles. Higher mileage vehicles may exhibit a similar symptom caused by a component failure. However, whenever major transmission repairs are performed the transmission software should be checked and updated as necessary.

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Average mileage: 103,678 (6,880–240,000)
9 model years affected: 2002, 2003, 2004, 2005, more2006, 2007, 2008, 2009, 2010
46 people reported this problem
20 people shared problem details
2005 Kia Sedona98,000
TRANSMISSION WILL JUMP WHILE DRIVING, TYPICALLY WHEN STARTING A TRIP, ONCE TRANSMISSION JUMPS IT STAYS IN 3RD GEAR AND WILL NOT DOWN SHIFT. I CAN STOP THE CAR AND RRESTART AND THE PROBLEM SEEMS TO GO AWAY.
I recent just had the vehicle Speed sensor replaced for $180. Ok for a couple days then driving down the rode only a couple blocks from the house and about 35 m.p.h. the engine does a severe downshift and I hear the "check engine light" come on. I had it checked at Auto Zone which said it could be low fluid, ...transmission failure. Checked the fluid it was way over max (I had just bought this Sedona 3.5 van). Anyway I removed 5 quarts of a very contaminated fluid; remove drain pain plug with 24 mm. I added 3 clean quarts back to a normal level. removed the neg cable of the battery to reset the code to an off position. Started the engine and check light returned within 2 minutes but no downshift. It's going back to the shop that put the VSS in it tomorrow. Note: there is a recall on these cables that may help us. I'll report back my findings. Note #2-I read if a VSS is replaced their must be a factory update to the computer or the above can happen! Stay tuned!
2005 Kia Sedona111,000
Car jerks going up hills and sometimes when taking off from dead stop. Have to put foot heavy on accelerator to get car moving smoothly.
2006 Kia Sedona106,000
car would not go into reverse . Have an estimate of $2500. To put in rebuilt transmission.
2005 Kia Sedona200,000
TRANSMISSION JERKED HARD WITH LOUD BANG NOISE. AFTER THAT IT WON'Y SHIFT INTO HIGH GEAR OR REVERSE. MOTOR RUNS ALRIGHT.
2005 Kia Sedona170,000
When I change from park to drive or to reverse position, I hear and I feel a big "toc"in the transmission, but that doesn't keep it to operate, work, properly.
2006 Kia Sedona56,000
Transmission kicks hard once you stop after getting off the highway.
Transmission doesn't shift properly after taking off from a stop. RPM's go up to about 3500 before the van shifts.
2004 Kia Sedona92,000
Van drives and shifts well in city traffic, but doesn't want to go into higher gear for highway driving
2005 Kia Sedona97,000
Transmission locks and makes a grinding noise like metal being dragged across the pavement.
2004 Kia Sedona64,000
trany is slipping
2008 Kia Sedona145,000
Drives fine, then jerks once violently as is immediately downshifts into 3rd. Engine light comes one. Then it stays in third for rest of trip. Turn off and back on and things return to normal except engine light stays on. Within a mile or two it slams into 3rd again and we start over.
will not move when its in gear
2006 Kia Sedona130,000
the transmission changes up and down when going down the rd.not fixed yet
2005 Kia Sedona79,000
Ecu giving codes for things I have fixed . Got a new ecu an now hard shifting from 2nd to 3rd gear . Where can I get a computer update at.
The check-engine light stays on. The air conditioner lights flashes back and forth between AC and the Flow of Air light.
2003 Kia Sedona66,000
Check engine light. Speedometer stopped working
2005 Kia Sedona110,000
Hard down shift to 3rd and wont come out of 3rd. Stopping and turning off engines resets it and may not dot it agin for months but again it might do it the next day.
check engine light stays on, but mechanic says one of the four o2 sensors was replaced and it has to drive several hundred miles to align with the other three and not be seen as the bad one...for sensor to re-calibrate itself and be acceptable to the computer.
2010 Kia Sedona6,880
Several problems: takes off fast when it shifts into second, lugs up hills, and won't coast down hills - seems to downshift itself.
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