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Home >> Kia >> 2010 >> Soul Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 2) - 1.6L >> DTC P0420: Catalyst System Efficiency Below Threshold (Bank 1) >> General Information >> DTC Detecting Condition
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General Information: DTC Detecting Condition

DTC DETECTING CONDITION CHART

Item Detecting Condition Possible Cause
DTC Strategy
  • Oxygen storage capacity (Deterioration of Catalytic efficiency)
  • Exhaust system
  • S2
  • Catalyst converter
Enable Conditions
  • Engine speed 800~2800rpm
  • Engine load 33 ~60 %
  • Catalyst temp. (model) 580~800°C
  • Closed loop control
  • There is not misfire
  • There is not malfunction on HO2S/PCSV/ECTS
Threshold Value
  • Difference of 'amplitude of downstream O2 sensor' and 'amplitude of model signal' > 0.3
Diagnostic Time
  • 60 sec
MIL ON Condition
  • 2 driving cycle

S1: upstream oxygen sensor/S2: downstream oxygen sensor

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