Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2025 Kia Seltos X-LineFACTORY OEM SERVICE PROCEDURE
Identity Authentication Unit DTCS
IDENTITY AUTHENTICATION UNIT DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| B1603-00 | CAN BUS OFF |
| B160F-00 | IAU Local CAN Bus OFF |
| B165B-00 | IAU ECU I2C Error |
| B165C-00 | IAU Teaching Error (w/IBU) |
| B166D-00 | Front Left Door Handle Module Fault |
| B166E-00 | Front Right Door Handle Module Fault |
| B16C5-00 | CAN time-Out DHFL (Door Handle Front Left Module) |
| B16C6-00 | CAN time-Out DHFR (Door Handle Front Right Module) |
| B18CF-00 | IAU ECU SPI Error |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.