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Home >> Chevrolet >> 2004 >> Optra Base, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 1.8L (L79) - Repair Instructions >> Repair Instructions >> Engine Coolant Temperature Sensor Replacement >> Removal Procedure
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Removal Procedure

    Fig 1: View Of ECT Sensor Connector
    GM1256151Courtesy of GENERAL MOTORS CORP.
  1. Relieve the coolant system pressure.
    2. CAUTION: Refer to Battery Disconnect Caution .
  2. Disconnect the negative battery cable.
  3. Disconnect the engine coolant temperature (ECT) sensor connector.
    4. NOTE: Use care when handling the coolant sensor. Damage to the coolant sensor will affect the operation of the fuel control system.
  4. Remove the ECT sensor from the electronic ignition (EI) system ignition coil adapter.
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