Chevrolet Aveo 2009 Service Manual page 19

Document ID: 2097744
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2009 Chevrolet Aveo Aveo, Wave, G3, Barina (VIN S/T) Service Manual
Heated Oxygen Sensor Replacement - Sensor 2
Removal Procedure
Warning: Refer to
1. Disconnect the negative battery cable.
Caution: Do not remove the pigtail from either the heated oxygen sensor (HO2S) or the
oxygen sensor (O2S). Removing the pigtail or the connector will affect sensor operation.
Handle the oxygen sensor carefully. Do not drop the HO2S. Keep the in-line electrical
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, connector or terminals. Replace the oxygen sensor if the pigtail
wiring, connector, or terminal is damaged.
This external clean air reference is obtained by way of the oxygen sensor signal and heater
wires. Any attempt to repair the wires, connectors, or terminals could result in the
obstruction of the air reference and degraded sensor performance.
The following guidelines should be used when servicing the heated oxygen sensor:
• Do not apply contact cleaner or other materials to the sensor or vehicle harness
connectors. These materials may get into the sensor causing poor performance.
• Do not damage the sensor pigtail and harness wires in such a way that the wires inside
are exposed. This could provide a path for foreign materials to enter the sensor and
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Repair Instructions
Battery Disconnect Warning
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Engine Engine Controls and Fuel - 1.4L (L95)
in the Preface section.
Page 1 of 3
7/6/2010