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Immobilizer System DTCS

WARNING: This page is about a different car, the 2015 Kia Forte5, 2015 Kia Forte Koup, and 2015 Kia Forte. However, it is still accessible from the selected car via links, so may be relevant.
IMMOBILIZER SYSTEM DIAGNOSTIC TROUBLE CODE DESCRIPTION

DTC Description
DTC P1677 Immobilizer-EMS VIN Data Error (EMS has different VIN)
DTC P1678 Immobilizer-EMS No Request (EMS data line open, no immo.)
DTC P1679 Immobilizer-EMS Data Fail (Data frame, CS, Message error)
DTC P1688 Immobilizer Lock
DTC P1691 Immobilizer-Antenna Coil Error
DTC P1693 Immobilizer-Transponder Error
DTC P1698 Immobilizer-Invalid TP (TP has different PIN)