Lanos S Hatchback L4-1.6L DOHC D-TEC MFI (1999)
Oxygen Sensor: Service and Repair
Oxygen Sensor (02S 1)
Removal Procedure
1. Disconnect the negative battery cable.
NOTE: The oxygen sensor uses a permanently attached pigtail and connector. This pigtail should not be removed from the oxygen sensor.
Damage or removal of the pigtail or the connector could affect proper operation of the oxygen sensor. Take care when handling the oxygen sensor.
Do not drop the oxygen sensor.
2. Disconnect the oxygen sensor (O2S 1) connector.
NOTE: The oxygen sensor may be difficult to remove when engine temperature is below 48 °C (120 °F). Excessive force may damage threads in
the exhaust manifold.
3. Carefully remove the O2S 1 from the exhaust manifold.
Installation Procedure
IMPORTANT: A special anti-seize compound is used on the oxygen sensor threads. This 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. New or service sensors will already have the compound
applied to the threads. If a sensor is removed from any engine and if for any reason it is to be reinstalled, the threads must have anti-seize compound
applied before reinstallation.
1. Coat the threads of the O2S 1 with an anti-seize compound, if needed.
2. Install the O2S 1 into the exhaust manifold.
Tighten
