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Home >> Chevrolet >> 2018 >> Suburban 3500 HD LT >> Repair and Diagnosis >> External Pages >> Different car >> Section 2 (Engine Controls And Fuel - 5.3L (L83) Or 6.2L (L86) - DTC P0010 To DTC P0442) >> Diagnostic Information And Procedures >> DTC P0089, P00C6, P228C, P228D, P2C1E, P2C1F, P2C20: Fuel Pressure Regulator >> Circuit/System Verification

Circuit/System Verification

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, 2018 Chevrolet Suburban, and 2018 Cadillac Escalade ESV. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition - On / Vehicle - In Service Mode
  2. Verify DTC P0016, P0017, P0018, P0019, P0090, P0091, P0092, P00C8, P00C9, P00CA, P0111, P0112, P0113, P0116, P0117, P0118, P0128, P0192, P0193, P0335, P0336, P0340, P0341, P0345, P0346, P0365, P0366, P0390, P0391, P0628 is not set.
    • Go to next step : If none of the DTCs are set 
  3. Engine - Cranking - For 10 s

    Verify the function : Engine = Running

    • If the function does not workIncorrect tagging -1, needs to be bole

      Refer to Circuit/System Testing below

    • If the function worksIncorrect tagging -1, needs to be bole
  4. Engine - Idling
  5. Verify the scan tool parameter : Fuel Rail Pressure Sensor 1 = 1.9 to 5.0 MPa (276 to 725 PSI)
    • If not between 1.9 and 5.0 MPa (276 and 725 PSI) 

      Refer to Circuit/System Testing below

    • Go to next step : If between 1.9 and 5.0 MPa (276 and 725 PSI) 
  6. Perform the scan tool control function : Fuel Rail Pressure - Increase & Decrease

    Verify the scan tool parameter : Fuel Rail Pressure = The value should change with each command.

    • If the value does not change 

      Refer to Circuit/System Testing below

    • Go to next step : If the value changes 
  7. Clear the DTCs.
  8. From a stop, accelerate to 7, 000 RPM with the throttle position greater than 95%.
    WARNING: Road test a vehicle under safe conditions and while obeying all traffic laws. Do not attempt any maneuvers that could jeopardize vehicle control. Failure to adhere to these precautions could lead to serious personal injury and vehicle damage.

    Verify the scan tool parameter : Fuel Rail Pressure Sensor 1 = 14 to 17 MPa (2, 031 to 2, 466 PSI)

    • If not between 14 and 17 MPa (2, 031 and 2, 466 PSI) 

      Refer to Circuit/System Testing below

    • Go to next step : If between 14 and 17 MPa (2, 031 and 2, 466 PSI) 
  9. 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 below

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