LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls And Fuel - 1.8L (LUW, LWE) - DTC P0010 To DTC P0442) >> Diagnostic Information and Procedures >> DTC P0420: Catalyst System Low Efficiency >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different variant/trim than selected.
  1. Verify the conditions listed below do not exist with the catalytic converter(s):
    • Dents
    • Severe discoloration caused by excessive temperatures
    • Road damage
    • Internal rattles caused by damaged catalyst substrate
    • Restrictions
      • If a condition is found 

        Replace the catalytic converter(s).

      • If no condition is found 
  2. Verify the conditions listed below do not exist with the exhaust system:
    • Leaks
    • Physical damage
    • Loose or missing hardware
      • If a condition is found 

        Repair or replace the component as necessary.

      • If no condition is found 
  3. Verify the conditions listed below do not exist with the B52B heated oxygen sensor 2:
    • Incorrect torque
    • Damage
    • If a condition is found 

      Replace the B52B heated oxygen sensor 2 or repair the condition as necessary.

    • If no condition is found 
  4. Test or replace the catalytic converter and the exhaust front pipe.
scientia non olet · About LEMON Manuals