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Chevrolet Cruze Repair Manual: Heated Oxygen and Oxygen Sensor Caution

Chevrolet Cruze Repair Manual / Preface / Heated Oxygen and Oxygen Sensor Caution

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:

Heated Oxygen Sensor Resistance Learn Reset Caution

Caution: When replacing the HO2S perform the following:

Perform the above in order to reset the HO2S resistance learned value and avoid possible HO2S failure.

Installing Hoses without Twists or Bends Caution

Caution: The inlet and outlet hoses must not be twisted during installation. Do not bend or distort the inlet or outlet hoses to make installation easier. Failure to follow these procedures could result in component damage.

OBDII Symbol Description Caution

Caution: The OBD II symbol is used on the circuit diagrams in order to alert the technician that the circuit is essential for proper OBD II emission control circuit operation. Any circuit which fails and causes the malfunction indicator lamp (MIL) to turn ON, or causes emissionsrelated component damage, is identified as an OBD II circuit.

Pipe Wrench Positioning Caution

Caution: The pipe wrench must be placed at the valve end of the steering gear and positioned up against the inner tie rod housing. Placing the pipe wrench in any other location will cause damage to the steering gear.

Power Steering Hose Disconnected Caution

Caution: Do not start the vehicle with any power steering gear inlet or outlet hoses disconnected. When disconnected, plug or cap all openings of components. Failure to do so could result in contamination or loss of power steering fluid and damage to the system.

Silicon Contamination of Heated Oxygen Sensors Caution

Caution: Contamination of the oxygen sensor can result from the use of an inappropriate RTV sealant (not oxygen sensor safe) or excessive engine coolant or oil consumption. Remove the HO2S and visually inspect the portion of the sensor exposed to the exhaust stream in order to check for contamination. If contaminated, the portion of the sensor exposed to the exhaust stream will have a white powdery coating. Silicon contamination causes a high but false HO2S signal voltage (rich exhaust indication). The control module will then reduce the amount of fuel delivered to the engine, causing a severe driveability problem. Eliminate the source of contamination before replacing the oxygen sensor.

Work Stall Test Warning
Warning: One or more of the following guidelines may apply when performing specific required tests in the work stall: When a test requires spinning the drive wheels with the vehicle jacked up, ad ...

Steering Column in Lock Position Caution
Caution: With wheels of the vehicle facing straight ahead, secure the steering wheel utilizing steering column anti-rotation pin, steering column lock, or a strap to prevent rotation. Locking of th ...

Other materials:

Transmission
Driver Shift Control (DSC) allows the automatic transmission to be shifted similar to a manual transmission. Electronic Range Select (ERS) allows for the selection of a range of gears. Up-Shift Light If the vehicle has a manual transmission, it will have an up-shift light that indicates whe ...

Additional Maintenance and Care
Your vehicle is an important investment and caring for it properly may help to avoid future costly repairs. To maintain vehicle performance, additional maintenance services may be required. It is recommended that your dealer perform these services Ч their trained dealer technicians know your v ...

Interior Lighting
Dome Lamps The dome lamp controls are located in the headliner. : Press to turn the lamps off, even when a door is open. : Press to turn the lamps on automatically when a door is opened. : Press to turn on the dome lamps. Reading Lamps The reading lamps are located in the overhead con ...

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