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Home >> Kia >> 2007 >> Rio Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> DTC Troubleshooting Procedures (2 Of 2) >> DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1) >> DTC Detecting Condition

DTC P0420 Catalyst System Efficiency Below Threshold (Bank 1): DTC Detecting Condition

DTC DETECTING CONDITION AND POSSIBLE CAUSES

Item Detecting Condition Possible Cause
DTC Strategy
  • Oxygen storage capacity
  • Exhaust system
  • B1S2
  • Catalyst converter
  • ECM/PCM
Enable Conditions
  • Engine speed 1200~3000rpm
  • Engine load 15~50%
  • Catalyst temp.(model) 470~7001: (878~1292°F)
  • Purge factor (high load canister) < 12
  • Closed loop control
Threshold Value
  • Amplitude of downstream 02 sensor signal > 0.5
Diagnostic Time
  • 60 sec
MIL ON Condition
  • 2 driving cycle
* B1S1: upstream oxygen sensor / B1S2: downstream oxygen sensor
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