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)AIR CONDITIONING SYSTEM DTCS
2015 Kia Optima EX
Air Conditioning System DTCS
2015 Kia Optima EXSECTION Air Conditioning System DTCS
AIR CONDITIONING SYSTEM DIAGNOSTIC TROUBLE CODES (DTC) LIST
| DTC | Description |
|---|---|
| DTC B1204 | Air Mix Potentiometer Open (Low)-Passenger |
| DTC B1205 | Air Mix Potentiometer Short (High)-Passenger |
| DTC B1208 | Intake Potentiometer Open (Low) |
| DTC B1209 | Intake Potentiometer Short (High) |
| DTC B1233 | In-Car Temperature Sensor Short (Low) |
| DTC B1234 | In-Car Temperature Sensor Open (High) |
| DTC B1237 | Ambient Temperature Sensor Short (Low) |
| DTC B1238 | Ambient Temperature Sensor Open (High) |
| DTC B1241 | Evaporator Sensor Short (Low) |
| DTC B1242 | Evaporator Sensor Open (High) |
| DTC B1245 | Air Mix Potentiometer Open (Low)-Driver |
| DTC B1246 | Air Mix Potentiometer Short (High)-Driver |
| DTC B1249 | Direction Potentiometer Open (Low)-Driver |
| DTC B1250 | Direction Potentiometer Short (High)-Driver |
| DTC B1281 | Humidity Sensor Short (Low) - AUTO Defog |
| DTC B1282 | Humidity Sensor Open (High) - AUTO Defog |
| DTC B1283 | Direction Potentiometer Open (Low) - AUTO Defog |
| DTC B1284 | Direction Potentiometer Short (High) - Auto Defog |
| DTC B1285 | Direction Control Motor - AUTO Defog |
| DTC B1672 | APT Sensor Fault - CAN Signal |
| DTC B1685 | Engine RPM fault - CAN Signal |
| DTC B1686 | Vehicle Speed Sensor Fault - CAN Signal |
| DTC B1687 | Engine Coolant Temperature Sensor Circuit - CAN Signal |
| DTC B1688 | Cluster Ionizer Fault |
| DTC B2406 | Air Mix Motor - Driver |
| DTC B2408 | Intake Motor |
| DTC B2409 | Direction Control Motor-Driver |
| DTC B2415 | Air Mix Door Motor-Passenger |
| DTC B16A4 | ECV Fault |
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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.