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)TIRE PRESSURE MONITORING SYSTEM (TPMS) DTCS
2015 Kia Optima EX
Tire Pressure Monitoring System (TPMS) DTCS
2015 Kia Optima EXSECTION Tire Pressure Monitoring System (TPMS) DTCS
TIRE PRESSURE MONITORING SYSTEM DIAGNOSTIC TROUBLE CODES (DTC) LIST
| DTC | Description |
|---|---|
| DTC C1121 | Front Left Sensor Battery Voltage Low |
| DTC C1122 | Front Right Sensor Battery Voltage Low |
| DTC C1123 | Rear Left Sensor Battery Voltage Low |
| DTC C1124 | Rear Right Sensor Battery Voltage Low |
| DTC C1126 | TPMS ECU Battery Voltage Low |
| DTC C1127 | TPMS ECU Battery Voltage High |
| DTC C1212 | Vehicle Speed Sensor |
| DTC C1312 | Front Left Sensor RF Channel Failure |
| DTC C1313 | Front Right Sensor RF Channel Failure |
| DTC C1314 | Rear Left Sensor RF Channel Failure |
| DTC C1315 | Rear Right Sensor RF Channel Failure |
| DTC C1322 | Front Left Sensor Over Temperature |
| DTC C1323 | Front Right Sensor Over Temperature |
| DTC C1324 | Rear Left Sensor Over Temperature |
| DTC C1325 | Rear Right Sensor Over Temperature |
| DTC C1332 | Front Left Sensor Fault |
| DTC C1333 | Front Right Sensor Fault |
| DTC C1334 | Left Rear Sensor Fault |
| DTC C1335 | Rear Right Sensor Fault |
| DTC C1611 | CAN Time-out EMS |
| DTC C1616 | CAN Bus Off |
| DTC C1642 | CAN Message Failure - Brake |
| DTC C1660 | Receiver RF Circuit Fail |
| DTC C1662 | Auto Learning failure |
| DTC C1663 | Auto Location Failure |
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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.