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.
2018 Kia Optima Plug-In Hybrid EXFACTORY OEM SERVICE PROCEDURE
DTC Index
DTC INDEX
| DTC | Description |
|---|---|
| DTC P0300 | 00: Random/Multiple Cylinder Misfire Detected |
| DTC P0301 | 00: Cylinder 1 - Misfire detected |
| DTC P0302 | 00: Cylinder 2 - Misfire detected |
| DTC P0303 | 00: Cylinder 3 - Misfire detected |
| DTC P0304 | 00: Cylinder 4 - Misfire detected |
| DTC P0315 | 00: Crankshaft Position System Variation Not Learned |
| DTC P0326 | 00: Knock Sensor 1 Circuit Range/Performance |
| DTC P0335 | 00: Crankshaft Position Sensor 'A' Circuit |
| DTC P0336 | 00: Crankshaft Position Sensor 'A' Circuit Range/Performance |
| DTC P0340 | 00: Camshaft Position Sensor 'A' (Intake) Circuit (Bank 1 or Single Sensor) |
| DTC P0341 | 00: Camshaft Position Sensor 'A' (Intake) Circuit Range/Performance (Bank 1) |
| DTC P0365 | 00: Camshaft Position Sensor 'B' (Exhaust) Circuit Malfunction (Bank 1) |
| DTC P0366 | 00: Camshaft Position Sensor 'B' (Exhaust) Circuit Range/Performance (Bank 1) |
| DTC P0401 | 00: Exhaust Gas Recirculation Flow Insufficient Detected |
| DTC P0404 | 00: Exhaust Gas Recirculation Control Circuit Range/Performance |
| DTC P0405 | 00: Exhaust Gas Recirculation Sensor A Circuit Low |
| DTC P0406 | 00: Exhaust Gas Recirculation Sensor A Circuit High |
| DTC P0420 | 00: Catalyst System Efficiency Below Threshold (Bank 1) |
| DTC P043E | 00: EVAP System Leak Detection Reference Orifice Low Flow |
| DTC P043F | 00: EVAP System Leak Detection Reference Orifice High Flow |
| DTC P0441 | 00: Evaporative Emission System Incorrect Purge Flow |
| DTC P0442 | 00: Evaporative Emission System-Leak detected (small leak) |
| DTC P0444 | 00: Evaporative Emission System-Purge Control Valve Circuit Open |
| DTC P0445 | 00: Evaporative Emission System-Purge Control Valve Circuit Shorted |
| DTC P0447 | 00: Evaporative Emission System-Vent Control Circuit Open |
| DTC P0448 | 00: Evaporative Emission System - Vent Control Circuit Shorted |
| DTC P0449 | 00: Evaporative Emission System-Vent Valve/Solenoid Circuit |
| DTC P0451 | 00: Evaporative Emission System-Pressure Sensor/Switch Range/Performance |
| DTC P0452 | 00: Evaporative Emission System-Pressure Sensor/Switch Low Input |
| DTC P0453 | 00: Evaporative Emission System-Pressure Sensor/Switch High Input |
| DTC P0454 | 00: Evaporative Emission System-Pressure Sensor/Switch Intermittent |
| DTC P0455 | 00: Evaporative Emission System-Leak detected (Large leak) |
| DTC P0456 | 00: Evaporative Emission System-Leak detected (very small leak) |
| DTC P0461 | 00: Fuel Level Sensor 'A' Circuit Range/Performance |
| DTC P0462 | 00: Fuel Level Sensor 'A' Circuit Low Input |
| DTC P0463 | 00: Fuel Level Sensor 'A' Circuit High Input |
| DTC P0464 | 00: Fuel Level Sensor 'A' Circuit Intermittent |
| DTC P0489 | 00: Exhaust Gas Recirculation Control Circuit Low |
| DTC P0490 | 00: Exhaust Gas Recirculation Control Circuit High |
| DTC P049D | 00: EGR 'A' Control Position Exceeded Learning Limit |
| DTC P04ED | 00: EVAP System Large Leak Detected - Fresh Air Side |
| DTC P04EF | 00: EVAP System Very Small Leak Detected - Fresh Air Side |
| DTC P0504 | 00: Brake Switch 'A'/'B' Correlation |
| DTC P0506 | 00: Idle Air Control System- RPM Lower than Expected |
| DTC P0507 | 00: Idle Air Control System- RPM Higher than Expected |
| DTC P050A | 00: Cold Start Idle Air Control System Performance |
| DTC P050B | 00: Cold Start Ignition Timing Performance |
| DTC P0532 | 00: A/C Refrigerant Pressure Sensor 'A' Circuit Low Input |
| DTC P0533 | 00: A/C Refrigerant Pressure Sensor 'A' Circuit High Input |
| DTC P0560 | 00: System Voltage |
| DTC P0562 | 00: System Voltage Low |
| DTC P0563 | 00: System Voltage High |
| DTC P0605 | 00: Internal Control Module Read Only Memory (ROM) Error |
| DTC P0606 | 00: ECM/PCM Processor |
| DTC P061A | 00: Internal Control Module Torque Performance |
| DTC P061B | 00: Internal Control Module Torque Calculation Performance |
| DTC P061C | 00: Internal Control Module Engine RPM Performance |
| DTC P062B- | 0: Internal Control Module Fuel Injector Control Performance |
| DTC P0607 | 00: Control Module Performance |
| DTC P0630 | 00: VIN Not Programmed or Incompatible-ECM/PCM |
| DTC P0638 | 00: Throttle Actuator Control Range/Performance |
| DTC P0642 | 00: Sensor Reference Voltage 'A' Circuit Low |
| DTC P0643 | 00: Sensor Reference Voltage 'A' Circuit High |
| DTC P064A | 00: Fuel Pump Control Module |
| DTC P064D | 00: Internal Control Module O2 Sensor Processor Performance Bank 1 |
| DTC P0652 | 00: Sensor Reference Voltage 'B' Circuit Low |
| DTC P0653 | 00: Sensor Reference Voltage 'B' Circuit High |
| DTC P0698 | 00: Sensor Reference Voltage 'C' Circuit Low |
| DTC P0699 | 00: Sensor Reference Voltage 'C' Circuit High |
| DTC P06A4 | 00: Sensor Reference Voltage 'D' Circuit Low |
| DTC P06A5 | 00: Sensor Reference Voltage 'D' Circuit High |
| DTC P1160 | 00: Duration of the key off is too shot |
| DTC P1230 | 00: Low Pressure Fuel Pump malfunction |
| DTC P1233 | 00: Low Pressure Fuel System - High deviation between target and current pressure |
Factory Service Tools
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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.
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