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Home >> Chevrolet >> 2017 >> Malibu LS >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Engine Controls And Fuel - 2.0L (LTG) - DTC P0335 To DTC P2635 And Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Fuel System Diagnosis >> Circuit/System Testing >> Fuel Pressure Leaks Down

Fuel Pressure Leaks Down

WARNING: This page is about a different variant/trim than selected.
  1. Ignition OFF, relieve the fuel pressure. Refer to Fuel Pressure Relief .
  2. Install the EN 37287  Adapter between the chassis fuel feed hose and the high pressure fuel pump.
  3. Open the valve on the EN 37287  Adapter.
  4. Ignition ON, command the Fuel Pump Enable On and then Off with a scan tool.
  5. Close the valve on the EN 37287  Adapter.
  6. Verify that the Fuel Pressure Sensor parameter does not decrease greater than 34 kPa (5 psi) in 1 minute.
    • If greater than 34 kPa (5 psi) 

      Replace the G12 Fuel Pump.

    • If less than 34 kPa (5 psi) 

      Locate and replace the leaking Q17 Fuel Injector.

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