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Home › Chevrolet › 2012 › Orlando LS, Automatic Trans › Repair and Diagnosis › Engine Performance › System › Engine Controls/Fuel - 2.4L - Diagnostic Information And Procedures › Diagnostic Information and Procedures › DTC P0420 › Circuit/System Testing

Circuit/System Testing

  1. Verify the following conditions do not exist with the catalytic converter:
    • Dents
    • A severe discoloration caused by excessive temperatures
    • Road damage
    • An internal rattle caused by damaged catalyst substrate
    • Restrictions
      • If a condition is found, replace the catalytic converter.
  2. Verify the following conditions do not exist with the exhaust system:
    • Leaks
    • Physical damage
    • Loose or missing hardware
      • If a condition is found, repair the exhaust system.
  3. Verify the following conditions do not exist with the B52B Heated Oxygen Sensor 2.
    • The HO2S is not at the correct torque
    • Damage
      • If a condition is found, repair or replace the B52B Heated Oxygen Sensor 2 as necessary.
  4. If all physical conditions test normal, test or replace the catalytic converter.
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