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Immobilizer System DTCS

WARNING: This page is about a different car, the 2020 Hyundai Santa Fe. However, it is still accessible from the selected car via links, so may be relevant.
IMMOBILIZER SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Description
DTC P1691 00: Immobilizer Antenna Coil Error
DTC P1693 00: Transponder No Response Error Invalid Response
DTC P1698 00: Immobilizer Invalid TP (TP has different PIN)
DTC P1677 00: Immobilizer EMS VIN Data Error (EMS has different VIN)
DTC P1678 00: Immobilizer EMS Request (EMS data line open, no immo.)
DTC P1688 00: Immobilizer Lock