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Home >> Buick >> 2019 >> Regal TourX Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 139 (Engine Controls And Fuel - 3.6L (LGX) - Diagnostic Information And Procedures (P0449-P3436) And Symptoms) >> Diagnostic Information and Procedures >> DTC P2635 or P2BB3 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2020 Buick Regal and 2019 Buick Regal. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:

Do not replace the fuel pump power control module based on a history DTC P2635. DTC P2635 may be stored but that does not indicate a failure of the fuel pump power control module. Refer to Strategy Based Diagnosis for further history DTC diagnostics.

  1. Verify the proper fuel system pressure. Refer to Fuel System Description .
    • If the fuel pressure is not normal 

      Repair the fuel system as necessary.

    • Go to next step: If the fuel pressure is normal 
  2. All OK.
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