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 (4 Of 6)
- DTC Index
- DTC P0406-00: Exhaust Gas Recirculation Sensor A Circuit High
- DTC P0420-00: Catalyst System Efficiency Below Threshold (Bank 1)
- DTC P042E-00: Exhaust Gas Recirculation 'A' Control Stuck Open
- DTC P042F-00: Exhaust Gas Recirculation 'A' Control Stuck Closed
- DTC P0442-00: Evaporative Emission System-Leak detected (small leak)
- DTC P0444-00: Evaporative Emission System-Purge Control Valve Circuit Open
- DTC P0449-00: Evaporative Emission System - Vent Valve/Solenoid Circuit
- DTC P0451-00: Evaporative Emission System-Pressure Sensor Range/Performance
- DTC P0452-00: Evaporative Emission System-Pressure Sensor Low Input
- DTC P0453-00: Evaporative Emission System-Pressure Sensor High Input
- DTC P0455-00: Evaporative Emission System-Leak detected (Large leak)
- DTC P0456-00: Evaporative Emission System-Leak detected (very small leak)
- DTC P0458-00: Evaporative Emission System Purge Control Valve Circuit Low
- DTC P0459-00: Evaporative Emission System Purge Control Valve Circuit High
- DTC P0462-00: Fuel Level Sensor 'A' Circuit Low Input
- DTC P0463-00: Fuel Level Sensor 'A' Circuit High Input
- DTC P0489-00: Exhaust Gas Recirculation Control Circuit Low
- DTC P0490-00: Exhaust Gas Recirculation Control Circuit High
- DTC P0498-00: Evaporative Emission System Vent Valve Control Circuit Low
- DTC P0499-00: Evaporative Emission System Vent Valve Control Circuit High
- DTC P049D-00: EGR 'A' Control Position Exceeded Learning Limit
- DTC P04DF-00: EVAP System Purge Control Valve 'A' Performance/Stuck Open
- DTC P04E0-00: EVAP System Purge Control Valve 'A' Stuck Closed
- 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
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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