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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 P0089, P00C6, P228C, or P228D: Fuel Pressure Regulator >> Circuit/System Testing

Circuit/System Testing

    NOTE:

    Circuit/System Verification must be performed first or misdiagnosis may result.

  1. Remove the G18 High Pressure Fuel Pump.
  2. Verify the lobes on the camshaft do not have unusual wear or are worn.
    • If the lobes have unusual wear or are worn 

      Replace the Camshaft.

    • If the lobes are OK 
  3. Test or replace the G18 High Pressure Fuel Pump.
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