Kia Sedona: Battery replacement
A smart key battery should last for several years, but if the smart key is not working properly, try replacing the battery with a new one. If you are unsure how to use your smart key or replace the battery, contact an authorized Kia dealer.
1. Remove the mechanical key.
2. Pry open the rear cover.
3. Replace the battery with a new battery (CR2032). When replacing the battery, make sure the battery position.
4. Install the battery in the reverse order of removal.

Smart key precautions
Smart key immobilizer systemSS-B Solenoid Valve(ON/OFF) Description and Operation
Description
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SS-B solenoid valve is ON/OFF type.
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When TCM supplies power to solenoid valve, speed range is changed by operating the solenoid valve.
SS-B Solenoid Valve op ...
Troubleshooting
Troubleshooting
SymptomSuspect areaEngine will not start or stuggle to startVapor hose damaged or disconnectedEngine struggles to startMalfunction of the Purge Control Solenoid ValveRough idle or ...