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.
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HOMESERVICE MANUALSKIA2015OPTIMA EXREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEX - OPTIMA (EXCEPT HEV)POWER STEERING SYSTEM DTCS
2015 Kia Optima EX
Power Steering System DTCS
2015 Kia Optima EXSECTION Power Steering System DTCS
POWER STEERING SYSTEM DIAGNOSTIC TROUBLE CODES (DTC) LIST
| DTC | Description |
|---|---|
| DTC C1101 | Battery Voltage High |
| DTC C1102 | Battery Voltage Low |
| DTC C1109 | Ignition Voltage Fault |
| DTC C1259 | Steering Angle Sensor - Electrical Malfunction |
| DTC C1261 | Steering Angle Sensor Not Calibrated |
| DTC C1290 | Torque Sensor Main Signal Fail |
| DTC C1603 | Derating (EPS Thermal Protection) |
| DTC C1604 | ECU Hardware Error |
| DTC C1611 | CAN Time-Out ECM |
| DTC C1616 | CAN Bus Off |
| DTC C1622 | EMS Invalid Vehicle Speed |
| DTC C1692 | CAN Time-Out VSM |
| DTC C1693 | CAN Signal Error VSM |
| DTC C1700 | Byte Coding Error |
| DTC C1702 | Variant Coding Error |
| DTC C1704 | ECU Fail-Safe Relay Fail |
| DTC C1705 | ECU Precharge Circuit Fault |
| DTC C1804 | CAN time out LKAS |
| DTC C1805 | CAN Signal Failure LKAS |
| DTC C2400 | Motor Fault - Motor Not Running |
| DTC C2401 | Motor Circuit |
| DTC C2412 | Motor Short Or Open |
| DTC C2413 | Motor Current Fail (Current Over) |
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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.