volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Heated Oxygen Sensor 2, Checking|Page 2337 > < Heated Oxygen Sensor 2, Checking|Page 2335
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‹› A/C switched off.

‹› Ground (GND) 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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Perform a preliminary check to verify the customers complaint. Refer  to --> [ Preliminary Check ] See: Computers and Control Systems/Testing
and Inspection/Scan Tool Testing and Procedures/Preliminary Check.

Start diagnosis

Function test

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Connect scan tool.

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Start the engine and let it run at idle.

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Select "Diagnostic mode 6: Check test results of components  that are not continuously monitored".

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Select "Test-ID 01: Oxygen sensor monitoring before catalytic  converter".

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Select "Test-ID 131: Dynamic test".

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Check the specified values at idle.

If the specified values are obtained:

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End diagnosis and switch ignition off.

If the specified values are not obtained:

Start diagnosis

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Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic  Converter (TWC) (G130) electrical harness connector -  1 -.

Heated Oxygen Sensor 2, Checking|Page 2337 > < Heated Oxygen Sensor 2, Checking|Page 2335