2021 Kia Rio LXFACTORY OEM SERVICE PROCEDURE

Immobilizer System DTCS

IMMOBILIZER SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Description
DTC P1677 EMS -VIN Data Error
DTC P1678 EMS-No Request
DTC P1679 EMS-Data Fail
DTC P1688 Immobilizer Lock
DTC P1691 Immobilizer-Antenna Error
DTC P1693 Transponder-Untaught (Virgin)
DTC P1698 Transponder-Invalid
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.