Astra L4-1.8L (2009)
Oxygen Sensor: Service and Repair
Heated Oxygen Sensor Replacement - Sensor 2
Heated Oxygen Sensor Replacement - Sensor 2
Special Tools
SA9603E /KM-6179 Oxygen Sensor Wrench Remover/Installer
Removal Procedure
Caution: The heated oxygen sensors each use a permanently attached pigtail and connector. Do not remove the pigtail from the heated oxygen
sensor. Damage or removal of the pigtail or the connector affects proper operation of the heated oxygen sensor. Handle the oxygen sensor
carefully. Do not drop the oxygen sensor. Keep the in-line connector and the louvered end free of grease, dirt, or other contaminants. Do not use
cleaning solvents of any type. Do not repair the wiring, the connector, or the terminals. Replace the oxygen sensor if the pigtail wiring, the
terminals, or the connector is damaged. Proper oxygen sensor operation requires an external air reference. This external air reference is obtained
by way of the oxygen sensor signal and heater wires. Any attempt to repair the wires, the connectors, or the terminals results in the obstruction of
the air reference and degrades the oxygen sensor performance. A dropped oxygen sensor is a bad oxygen sensor.
Caution: The oxygen sensor may be difficult to remove when the engine temperature is below 48°C (120°F). Excessive force may damage
threads in the exhaust manifold or the exhaust pipe.
1. Disconnect the oxygen sensor wiring harness plug (3).
2. Disconnect the wiring harness (2).
3. Remove the oxygen sensor (1) from the front exhaust pipe with SA9603E /KM-6179.
Installation Procedure
Caution: Refer to Fastener Caution (See: Service Precautions/Vehicle Damage Warnings/Fastener Caution).
Note: When re-using the oxygen sensor, coat the thread of the oxygen sensor with assembly paste (white).
1. Install the oxygen sensor 2 in the front exhaust pipe using SA9603E /KM-6179.
Tighten to 40 Nm (30 lb ft).
2. Connect the wiring harness plug for the oxygen sensor.
3. Install the wiring harness.
