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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 P2237 >> Circuit/System Verification
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Circuit/System Verification

  1. Engine idling at operating temperature. Observe the scan tool HO2S 1 Lambda parameter. Cycle the throttle from idle to wide open throttle 3 times within 5 seconds. The parameter should react immediately to the action.
  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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