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Home >> Suzuki >> 2006 >> XL-7 Base, RWD, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0420: Catalyst System Efficiency below Threshold (Bank 1) >> DTC Detecting Condition and Trouble Area
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DTC Detecting Condition and Trouble Area

DTC DETECTING CONDITION AND TROUBLE AREA CHART

DTC Detecting Condition Trouble Area
While running under conditions described for "DTC Confirmation Procedure", output waveform of HO2S-1 becomes similar to that of HO2S-2.
(2 driving cycle detection logic)
  • Exhaust gas leakage
  • Warm up three way catalytic converter
  • Heated oxygen sensor-2 or its circuit
  • ECM
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