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Home >> Chevrolet >> 2009 >> Traverse LS, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - 3.6L - DTC P0638 To DTC P2635 >> DTC P2232 or P2235 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the appropriate HO2S 2.
  2. Ignition ON, verify that the HO2S parameter is between 400-520 mV.
    • If greater than the specified range, test the signal circuit terminal B for a short to the heater control circuit terminal E. If the circuit/connections test normal, replace the ECM.
  3. If all circuits/connections test normal, replace the appropriate HO2S 2.
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