LEMON Manuals: Even more car manuals for everyone
Home >> Buick >> 2015 >> Regal GS, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Controls And Fuel - 2.0L (LTG) - DTC P0010 To DTC P0333 >> Diagnostic Information and Procedures >> DTC P0090-P0092, P00C8, P00C9, or P00CA: Fuel Pressure Regulator >> Circuit/System Verification

Circuit/System Verification

  1. Ignition ON.
  2. Verify DTC P0685 or P1682 is not set.
    • If none of the DTCs are set 
  3. Command the Fuel Pressure Regulator ON and OFF with a scan tool while observing the following control circuit status parameters:
    • Fuel Pressure Regulator Control Circuit High Voltage Test Status
    • Fuel Pressure Regulator Control Circuit Open Test Status
    • Fuel Pressure Regulator Control Circuit Low Voltage Test Status
    • Fuel Pressure Regulator High Control Circuit High Voltage Test Status
    • Fuel Pressure Regulator High Control Circuit Open Test Status
    • Fuel Pressure Regulator High Control Circuit Low Voltage Test Status
    • If Malfunction is displayed 

      Refer to Circuit/System Testing.

    • If OK or Not Run is displayed 
  4. 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.
  5. Verify the DTC does not set.
    • If the DTC sets 

      Refer to Circuit/System Testing

    • If the DTC does not set 
  6. All OK
scientia non olet · About LEMON Manuals