Kia Sedona: Ignition Switch Assembly
Repair procedures
Repair proceduresFor power tailgate
1. Put the shift lever in P (Park).
2. Press the tailgate handle switch and tailgate close button at the same time
for more than 3 seconds. (the chime will sound).
3. Close the tailgate manually.
...
Check spark plugs and ignition system
Inspect your spark plugs as described in section 7 and replace them if necessary.
Also check all ignition wiring and components to be sure they are not cracked, worn
or damaged in any way. ...