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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 P128E: Fuel Rail Pressure >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition ON.
  2. Observe the DTC information with a scan tool. Verify no other DTCs are set.
    • If other DTC is not set 
  3. Observe the Fuel Rail Pressure Sensor parameter with a scan tool. During engine cranking, the pressure should be greater than 10 MPa (1450 psi).
    • If 10 MPa (1450 psi) or less 

      Refer to Circuit/System Testing.

    • If greater than 10 MPa (1450 psi) 
  4. Observe the Fuel Rail Pressure Sensor parameter with a scan tool, at idle the pressure should be close to the Desired Fuel Rail Pressure. As the engine speed increases, the Desired Fuel Rail Pressure and the Actual Fuel Rail Pressure should closely match each other.
    • If pressure does not closely match 

      Refer to Circuit/System Testing.

    • If pressure closely matches 
  5. 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.
  6. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing.

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