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Home › Buick › 2008 › Allure CXS › Repair and Diagnosis › Engine Performance › System › Engine Control System & Fuel System - 3.6L - DTC P0008 To DTC P0333 › DTC P0135 › Circuit/System Verification

Circuit/System Verification

  1. Engine idling at normal operating temperature, observe the scan tool HO2S 1 Loop Status parameter. The parameter should display Closed Loop.
  2. 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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