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Home >> Suzuki >> 2008 >> XL7 Limited, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0420 or P0430 >> Circuit/System Testing
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Circuit/System Testing

  1. Observe the DTC information with a scan tool. Verify there are no HO2S, or misfire DTCs set.
  2. Inspect and verify the following:
    • The catalytic converter is an original part
    • The HO2S 2 is secure and the wiring is not damaged, or contacting the exhaust
    • The exhaust system for leaks, damage, or missing hardware
      • If a condition is found, repair as necessary.
        NOTE: Before replacing the catalytic converter, correct any conditions that may have damaged the converter.
  3. If a condition is not located, replace the catalytic converter.
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