Chevrolet Aveo 2009 Service Manual page 17

Document ID: 2097738
cause performance problems.
• Ensure the sensor or vehicle lead wires are not bent sharply or kinked. Sharp bends or
kinks could block the reference air path through the lead wire.
• Do not remove or defeat the oxygen sensor ground wire, where applicable. Vehicles
that utilize the ground wired sensor may rely on this ground as the only ground contact
to the sensor. Removal of the ground wire will cause poor engine performance.
• Ensure that the peripheral seal remains intact on the vehicle harness connector in order
to prevent damage due to water intrusion. The engine harness may be repaired using
Packard's Crimp and Splice Seals Terminal Repair Kit. Under no circumstances should
repairs be soldered since this could result in the air reference being obstructed.
Caution: Do not solder heated oxygen sensor wires. Soldering the wires will result in the loss
of the air reference to the sensor. Refer to Engine Electrical for proper wire and connection
repair techniques.
2. Disconnect the front heated oxygen sensor (HO2S) 1 connector.
Caution: Remove oxygen sensors with the engine temperature above 48°C (120°F).
Otherwise the oxygen sensors may be difficult to remove.
3. Carefully remove the HO2S1 from the exhaust manifold.
Installation Procedure
Note: 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.
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7/6/2010