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Home >> Chevrolet >> 2020 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different car >> Section 49 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0010-DTC P0459) >> Diagnostic Information and Procedures >> DTC P040B-P040E or P041B-P041E >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
  1. Engine Running.
  2. Verify DTC P0406 is not set.
    • Go to next step: If the DTC is not set 
  3. Verify the scan tool EGR Cooler Temperature Sensor parameter is between -39° to +999°C (-38° to +1, 830°F) and changes with engine run time.
    • If not within the specified range or does not change 

      Refer to Circuit/System Testing.

    • Go to next step: If within the specified range and changes 
  4. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not set. 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.

    • Go to next step: If the DTC does not set 
  6. All OK.