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.
2020 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 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 |
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.