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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 P0404 or P042E >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON/Vehicle in Service Mode.
  2. Verify DTC P0401, P0403, P0489, P0490, or P0641 is not set
    • Go to next step: If the DTC is not set 
  3. 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.
  4. Verify DTC P0404 or P042E does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

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