There is a connector under the coolant bottle which gets water into it causing it to corode. this causes the indicators to stay on(also i think it usually stops remotes working).
It would be worth checking it out, there are two fairly large connectors,you may need to move the coolant bottle(passenger side by the bulk head) to get to it.
usually clean the rust away and its fine.
To stop it happening again kia say to stick down a seal on the scuttle trim, if your not sure about doing it your dealer should be aware of it, there is a bulletin!
Also had a indicator relay pack-up before on sorento, behind trim on side of dash drivers side.
Hope this helps.