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
Engine Control System Diagnosis (3 Of 6) (PHEV)
- DTC Index
- 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
- Component Location
- General Description
- DTC Information
- DTC Inspection
- Wiring Inspection
- Terminal and Connector Inspection
- ELCM Pump Motor Power Circuit Inspection
- ELCM Pump Motor Control Circuit Inspection
- Changeover Valve Power Circuit Inspection
- Changeover Valve Control Circuit Inspection
- ELCM Pressure Sensor Power Circuit Inspection
- ELCM Pressure Sensor Signal Circuit Inspection
- ELCM Pressure Sensor Ground Circuit Inspection
- Component Inspection
- Verification Of Repair
- ETM
- DTC P043F-00: EVAP System Leak Detection Reference Orifice High Flow
- Component Location
- General Description
- DTC Information
- DTC Inspection
- Wiring Inspection
- Terminal and Connector Inspection
- ELCM Pump Motor Power Circuit Inspection
- ELCM Pump Motor Control Circuit Inspection
- Changeover Valve Power Circuit Inspection
- Changeover Valve Control Circuit Inspection
- ELCM Pressure Sensor Power Circuit Inspection
- ELCM Pressure Sensor Signal Circuit Inspection
- ELCM Pressure Sensor Ground Circuit Inspection
- Component Inspection
- Verification Of Repair
- ETM
- 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
Use the Manual With the Right Hardware
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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.