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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:

Windshield Washer Pump Seal Replacement
Removal Procedure Open the hood. Remove the windshield washer pump. Refer to Windshield Washer Pump Replacement Using a small flat-bladed tool, remove the washer pump terminal seal (1) from the washer solvent container (2). Installation Procedure Position the washer pump ...

Exterior Lighting
The exterior lamp control is to the left of the steering column on the instrument panel. : Briefly turn to this position to turn the automatic lamp control off or on again. AUTO: Turns the headlamps on automatically at normal brightness, together with the parking lamps, taillamps, license ...

Installation Procedure
Clean and prepare the attaching surfaces for welding. Apply structural adhesive to the attaching surfaces. Position the body rear end panel on the vehicle. Verify the fit of the body rear end panel. Clamp the body rear end panel into position. Spot weld accordingly as no ...

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