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3.8L - Upper O2 Sensor

The engines uses two heated oxygen sensors.

CAUTION: When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
  1. Disconnect negative battery cable.
  2. Disconnect the upper O2 sensor connector. See Fig 1.
    Fig 1: O2 Sensor Connector
    GC0000462Courtesy of DAIMLERCHRYSLER CORP.
  3. Use a socket such as Snap-On YA8875 or a crow foot wrench to remove oxygen sensor. See Fig 2.
    Fig 2: Upstream O2 Sensor
    GC0000464Courtesy of DAIMLERCHRYSLER CORP.
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