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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 P2232 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the HO2S 2.
  2. Ignition ON, observe the scan tool HO2S 2 voltage parameter. The parameter should display between 350-550 mV.
    • If greater than the specified range, test the high signal circuit for a short to the heater control circuit. If the circuit tests normal, replace the ECM.
  3. If all circuits test normal, replace the HO2S 2.
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