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Home >> GMC >> 2011 >> Acadia SLT, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 3.6L - DTC P0008 Through DTC P0393 >> Diagnostic Information and Procedures >> DTC P0128 >> Component Testing
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Component Testing

  1. Ignition OFF, disconnect the harness connector at the B34 engine coolant temperature sensor.
    2. NOTE:

    A thermometer can be used to the used to test the sensor off the vehicle.

  2. Test the ECT sensor by varying the sensor temperature while monitoring the sensor resistance. Compare the readings with the Temperature Versus Resistance - Engine Coolant Temperature Sensor table and verify that the resistance is within 5 % of the specification.
    • If not within the specified range, replace the B34 engine coolant temperature sensor.
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