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Home >> Buick >> 1987 >> Electra Base >> Repair and Diagnosis >> Engine Performance >> System >> Fuel Injection System - PFI >> Removal & Installation >> Oxygen Sensor >> Removal
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Oxygen Sensor: Removal

  1. Disconnect negative battery cable. On some 2.8L engines, vehicle should be safely raised on hoist because sensor is mounted behind exhaust "Y" pipe.
  2. Unplug O2 sensor electrical connector. O2 sensor may be difficult to remove when engine temperature is below 120°F (48°C). Remove O2 sensor.