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Passat Sedan V6-3.6L (BLV) (2008)

Powertrain Management > Computers and Control Systems > Oxygen Sensor > Component Information > Testing and Inspection > HO2S Front Oxygen Sensor Bank 1 Sensor 1, Checking

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Oxygen Sensor: Testing and Inspection
HO2S Front Oxygen Sensor Bank 1 Sensor 1, Checking

Diagnostic Procedures

HO2S Front Oxygen Sensor Bank 1 Sensor 1, Checking

The following procedure is used to diagnose both HO2S Oxygen Sensor Bank 1 Sensor 1 (G39) and HO2S Oxygen Sensor Bank 2 Sensor 1 (G108)

‹› Use only gold-plated terminals when servicing terminals in the electrical harness connectors of the HO2S Oxygen Sensor Bank 1 Sensor 1 (G39)

and HO2S Oxygen Sensor Bank 2 Sensor 1 (G108).

Special tools, testers and auxiliary items required

‹› Multimeter.

‹› Wiring diagram.

Test requirements

‹›  The HO2S Oxygen Sensor Bank 1 Sensor 1 (G39) fuse OK.

‹› The Oxygen Sensor Heater Bank 1 Sensor 1 (Z19) heater before catalytic converter OK.

‹› Battery voltage at least 12.5 volts.

‹› All electrical consumers such as, lights and rear window defroster, switched off.

‹› A/C switched off.

‹› Ground connections between engine/transmission/chassis OK.

‹› Exhaust system between catalytic converter and cylinder head properly sealed.

‹› Coolant Temperature at least 80° C.

Test procedure

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Observe safety precautions. Refer to => [ Safety Precautions ] See: Service Precautions/Safety Precautions

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Observe Clean Working Conditions. Refer to => [ Clean Working Conditions ] See: Service Precautions/Clean Working Conditions

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Perform a preliminary check to verify the customers complaint. Refer to => [ Preliminary Check ] See: Testing and Inspection/Scan Tool Testing
and Procedures/Preliminary Check.

Function test

Powertrain Management > Computers and Control Systems > Oxygen Sensor > Component Information > Testing and Inspection > HO2S Front Oxygen Sensor Bank 1 Sensor 1, Checking

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