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.
2021 Kia Seltos S TurboFACTORY OEM SERVICE PROCEDURE
4WD Control System DTCS
4WD CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION
| DTC | Description |
|---|---|
| DTC P0602 | Control Module Programming Error |
| DTC P1779 | Supply Voltage Missing |
| DTC P1780 | Battery Voltage High |
| DTC P1781 | Battery Voltage Low |
| DTC P1820 | Pump for 4WD Motor High Overcurrent Detected |
| DTC P1821 | Pump for 4WD Motor Wire Short to Battery |
| DTC P1822 | Pump for 4WD Motor Wire Open Load |
| DTC P1823 | Pump for 4WD Motor Wire Short to GND |
| DTC P1824 | Pump for 4WD Slow Thermal Overload |
| DTC P1825 | Pressure Sensor for 4WD Supply Short to Battery |
| DTC P1826 | Pressure Sensor for 4WD Supply Short to Ground |
| DTC P1827 | Pressure Sensor for 4WD Signal Wire Short to Battery |
| DTC P1828 | Pressure Sensor for 4WD Signal Wire Short to Ground |
| DTC P1829 | Clutch Torque Tolerance Upper Limit |
| DTC P1832 | Clutch Thermal Overstress Shutdown |
| DTC P1834 | Actuator Thermal Overstress Shutdown |
| DTC P1836 | Bleed Pressure Line Test Error |
| DTC P1837 | Vehicle Variant Can Not Be Detected |
| DTC U0001 | High Speed CAN Communication Bus off (C-CAN) |
| DTC U0100 | Lost Communication with ECM/PCM 'A' (C-CAN) |
| DTC U0101 | Lost Communication with TCM (C-CAN) |
| DTC U0121 | Lost Communication With Anti-Lock Brake System (ABS) Control Module |
| DTC U0122 | Lost Communication With Vehicle Dynamics Control Module |
| DTC U0123 | Wheel Speed Error in Communication |
| DTC U0126 | Steering Angle Signal Fault |
| DTC U1121 | Lost Communication With Electric Stability Program Module |
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.