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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 28 (Engine Controls And Fuel - 1.8L (LKN) - DTC P0010 To P0459) >> Diagnostic Information and Procedures >> DTC P0401: Exhaust Gas Recirculation (EGR) Flow Insufficient >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Ignition ON/Vehicle in Service Mode.
  2. Verify no other DTCs are set.
    • If no other DTCs are set 
  3. Verify none of the conditions listed below exist:
    • Restrictions in the EGR cooler, EGR cooler bypass valve and passages
    • Binding, damaged or restricted EGR valve.
    • Exhaust system leaks.
    • Exhaust system restrictions.
    • Wet or restricted air filter.
    • Loose or improperly connected hoses.
    • Damaged or missing components.
    • If any of the above conditions exists 

      Repair or replace the component as necessary.

    • If none of the conditions exist 
  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 

      Test or replace the Q14 Exhaust Gas Recirculation Valve.

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