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Home >> Chevrolet >> 2015 >> Cruze LT, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Controls And Fuel - 2.0L (LUZ) Diesel - DTC P0430 To DTC P2080) >> Diagnostic Information and Procedures >> DTC P0420: Catalyst System Low Efficiency >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition On.
  2. Verify DTCs P0101, P0102, P0103, P0112, P0113, P0117, P0118, P011B, P0234, P0299, P0545, P0546, P1400, P2032, P2033, P20E2, P2199 or P2463 are not set.
    • If no DTC is set 
  3. Engine running, observe the DTC information with a scan tool. DTC P0420 should not be set.
    • If the DTC is set 

      Refer to Circuit/System Testing.

    • If the DTC is not set 
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
  5. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

    • If the DTC does not set 
  6. All OK.
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