Software Update Available Which May Correct Transmission Issues on Kia Sedona

Problem Description and Possible Solution

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.

Problem Data
RepairPal Verified
Average mileage: 110,293 (6,880–240,000)
9 model years affected: 2002, 2003, 2004, 2005, more2006, 2007, 2008, 2009, 2010
54 people reported this problem
Viewing 1 - 20 of 24 problem details
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.
Transmission doesn't shift properly after taking off from a stop. RPM's go up to about 3500 before the van shifts.
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!
car would not go into reverse . Have an estimate of $2500. To put in rebuilt transmission.
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.
TRANSMISSION JERKED HARD WITH LOUD BANG NOISE. AFTER THAT IT WON'Y SHIFT INTO HIGH GEAR OR REVERSE. MOTOR RUNS ALRIGHT.
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.
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.
Transmission locks and makes a grinding noise like metal being dragged across the pavement.
Van drives and shifts well in city traffic, but doesn't want to go into higher gear for highway driving
Transmission kicks hard once you stop after getting off the highway.
trany is slipping
The check engine light is on and it will not go into overdrive.
Transmission jumps around while driving. Can happen anywhere. Sometimes it is constant and other trips, it doesn't happen at all.
will not move when its in gear
RPM's stay high at highway speeds. The vehicle doesn't shift into over drive.
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.
Several problems: takes off fast when it shifts into second, lugs up hills, and won't coast down hills - seems to downshift itself.
Does not shift into overdrive on highway and has no reverse.
the transmission changes up and down when going down the rd.not fixed yet