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Home >> Chevrolet >> 2019 >> Cruze Premier, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 10 (Engine Controls And Fuel - 1.6L (LH7) Diesel - Diagnostic Information And Procedures (P0016-P054F)) >> Diagnostic Information and Procedures >> DTC P0191-P0193, P127C, or P127D >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition - On/Vehicle - In Service Mode
  2. Verify the scan tool parameter: Fuel Rail Pressure Sensor 1 & Fuel Rail Pressure Sensor 2 = 0.4 to 4.5 V and changes
    • If not between 0.4 and 4.5 V or does not change 

      Refer to: Circuit/System Testing

    • Go to next step: If between 0.4 and 4.5 V and changes 
  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.

    Verify the DTC does not set.

    • If the DTC sets 

      Refer to: Circuit/System Testing

    • Go to next step: If the DTC is not set 
  4. All OK.