P0431 2003 KIA SEDONA Warm Up Catalyst Efficiency Below Threshold Bank 2

Possible causes – Catalytic converter deterioration or malfunction– Exhaust system leaks– Loose front or rear HO2Ss– Faulty front heater O2 sensor– O2 sensors harness is open or shorted– O2 sensors poor electrical connection Tech notes As the code description implies

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P0027 KIA Exhaust Valve Control Solenoid Circuit Range/Performance Bank 1

Possible causes – Dirty engine oil– Low engine oil level– Faulty exhaust valve control solenoid– Exhaust valve control solenoid harness is open or shorted– Exhaust valve control solenoid circuit poor electrical connection When is the code detected? ECM monitors OCV

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