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.
2021 Kia Rio LXFACTORY OEM SERVICE PROCEDURE
Engine Control System Diagnosis (3 Of 6)
- DTC Index
- DTC P0221-00: Throttle Position Sensor 2 Signal Circuit Range/Performance
- DTC P0222-00: Throttle Position Sensor 2 Signal Circuit Low Input
- DTC P0223-00: Throttle Position Sensor 2 Signal Circuit High Input
- DTC P0230-00: Fuel Pump Primary Circuit
- DTC P0261-00: Cylinder 1 Injector Circuit Low
- DTC P0262-00: Cylinder 1 Injector Circuit High
- DTC P0264-00: Cylinder 2 Injector Circuit Low
- DTC P0265-00: Cylinder 2 Injector Circuit High
- DTC P0267-00: Cylinder 3 Injector Circuit Low
- DTC P0268-00: Cylinder 3 Injector Circuit High
- DTC P0270-00: Cylinder 4 Injector Circuit Low
- DTC P0271-00: Cylinder 4 Injector Circuit High
- DTC P0300-00: Random Multiple Cylinder Misfire Detected
- Component Location
- General Description
- DTC Information
- DTC Inspection
- Wiring Inspection
- System Inspection
- Verification of Repair
- DTC P0301-00: Cylinder 1-Misfire detected
- Component Location
- General Description
- DTC Information
- DTC Inspection
- Wiring Inspection
- System Inspection
- Verification of Repair
- DTC P0302-00: Cylinder 2-Misfire detected
- Component Location
- General Description
- DTC Information
- DTC Inspection
- Wiring Inspection
- System Inspection
- Verification of Repair
- DTC P0303-00: Cylinder 3-Misfire detected
- Component Location
- General Description
- DTC Information
- DTC Inspection
- Wiring Inspection
- System Inspection
- Verification of Repair
- DTC P0304-00: Cylinder 4-Misfire detected
- Component Location
- General Description
- DTC Information
- DTC Inspection
- Wiring Inspection
- System Inspection
- Verification of Repair
- DTC P0326-00: Knock Sensor 1 Circuit Range/Performance (Bank 1)
- DTC P0335-00: Crankshaft Position Sensor 'A' Circuit
- DTC P0336-00: Crankshaft Position Sensor 'A' Circuit Range/Performance
- DTC P0341-00: Camshaft Position Sensor 'A' (Intake) Circuit Range/Performance (Bank 1)
- DTC P0342-00: Camshaft Position Sensor 'A' (Intake) Circuit Low Input
- DTC P0343-00: Camshaft Position Sensor 'A' (Intake) Circuit High Input
- DTC P0366-00: Camshaft Position Sensor 'B' (Exhaust) Circuit Range/Performance (Bank 1)
- DTC P0367-00: Camshaft Position Sensor 'B' (Exhaust) Circuit Low
- DTC P0368-00: Camshaft Position Sensor 'B' (Exhaust) Circuit High
- DTC P0401-00: Exhaust Gas Recirculation Flow Insufficient Detected
- DTC P0403-00: Exhaust Gas Recirculation Control Circuit
- DTC P0404-00: Exhaust Gas Recirculation Control Circuit Range/Performance
- DTC P0405-00: Exhaust Gas Recirculation Sensor A Circuit Low
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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