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Home >> Chevrolet >> 2017 >> Spark LT, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 97 (Engine Controls And Fuel - 1.6L (LWC) - DTC P0010 To DTC P0238) >> Diagnostic Information and Procedures >> DTC P0090-P0092, P00C8, P00C9, or P00CA >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify DTC P0685 or P1682 is not set.
    • Go to next step: 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.

    • Go to next step: 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.

    • Go to next step: If the DTC does not set 
  6. All OK
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