Grand AM V6-3.4L VIN E (2001)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor (HO2S) 1 Replacement
TOOLS REQUIRED
J 39194-B Heated Oxygen Sensor Socket
REMOVAL PROCEDURE
The healed oxygen sensor (HO2S 1) may be difficult to remove when engine temperature is less than 48°C (120°F). Excessive force may damage the
threads in the exhaust manifold.
1. Turn OFF the ignition.
2. Disconnect the HO2S 1.
IMPORTANT: A special anti-seize compound is used on the HO2S 1 threads. The compound consists of graphite suspended in fluid and glass
beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. New or service sensors will already have the
compound applied to the threads. If a sensor is removed from an engine and is to be reinstalled, the threads must have anti-seize compound applied
before the reinstallation.
3. Using a J 39194-B, carefully back out the heated oxygen sensor.
INSTALLATION PROCEDURE
1. Coat the threads of the HO2S 1 with anti-seize compound GM P/N 5813695, or an equivalent, if necessary.
NOTE: Refer to Fastener Notice in Service Precautions.
