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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 >> Component Testing

Component Testing

  1. Ignition OFF, disconnect the harness connector at the G18 High Pressure Fuel Pump.
    2. NOTE:

    The DMM and test leads must be calibrated to 0Ω in order to prevent misdiagnosis.

  2. Test for 0.3-0.7Ω at 20°C (68°F) between the high control circuit terminal 1 and the low control circuit terminal 2.
    • If not between 0.3-0.7Ω  

      Replace the G18 High Pressure Fuel Pump.

    • If between 0.3-0.7Ω 
  3. Test for infinite resistance between each terminal and the G18 High Pressure Fuel Pump housing.
    • If less than infinite resistance 

      Replace the G18 High Pressure Fuel Pump.

    • If infinite resistance 
  4. All OK
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