Front Oxygen Sensor (O2S 1)

Caution: The O2S 1 uses a permanently attached pigtail and connector. This pigtail should not be removed from the oxygen sensor. Damage or removal of the pigtail or connector could affect proper operation of the oxygen sensor.

Take care when handling the O2S 1. The in-line electrical connector and louvered end must be kept free of grease, dirt or other contaminants. Also, avoid using cleaning solvents of any type. DO NOT drop or roughly handle the O2S 1.

Figure 3A-11 - O2S 1:

REMOVE OR DISCONNECT

CAUTION: The O2S 1 may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may damage the threads in the exhaust manifold or exhaust pipe.

1. Ignition "OFF."
2. O2S 1 electrical connector.
3. Carefully remove the O2S 1.

INSTALL OR CONNECT

NOTE: A special anti-seize compound is used on the oxygen sensor threads. The compound consists of a liquid graphite and glass beads. The graphite will burn away, but the glass beads will remain, making the sensor easier to remove. A new or service O2S will already have the compound applied to the threads. Whenever a O2S is removed from an engine, and if for any reason the O2S is to be reinstalled, the threads must have an anti-seize compound applied before reinstallation.

1. Coat threads of oxygen sensor with anti-seize compound.
2. O2S 1.

Tighten The O2S to 41 Nm (30 ft. lbs.).

3. O2S 1 electrical connector.