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Home >> Buick >> 2008 >> Allure CXS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.6L - DTC P2105 To DTC P2626 >> DTC P2231 >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON, observe the scan tool DTC information. Verify that DTCs P0131, or P0132 are not set.
    • If any of the listed DTCs are set refer to DTC P0131 or DTC P0132 for further diagnosis.
  2. Engine idling at operating temperature. Observe the scan tool Loop Status Sen 1. Verify the scan tool displays Closed Loop.
  3. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records Data List.
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