Kia Troubleshooting Questions? Ask a Mechanic
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If anything after market has been wired into the vehicle into the radio system or components this can cause this issue here if it wasn't wired in properly or if the component is defective and may need re wired or removed to correct this fault here.If anything after market has been wired in this needs checked to see if this is the cause.
If nothing after market was wired in this can be due to an internal electrical fault in the radio itself with the radio needing removed and repaired or removed and replaced.This will have to be tested further to be sure of the cause here and from there repaired to correct this issue.
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In some cases the radio can go into a logic lock up and cause this after a battery replacement,in this case you should be able to disconnect the battery or remove the fuses for the radio for 5 minutes then reconnect the cable or reinstall the fuses to reset and correct this here.If this does not work it is possible a voltage surge damaged the radio when the new battery was connected and the radio would then need removed and repaired or replaced or that the radio needs coded/programmed by a dealer with their computer to correct this.Usually one of these will correct this fault here.I would try the reset first and if this doesn't work I would see if you can get it recoded to see if it corrects this fault.