volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Oxygen Sensor & O2 Sensor Regulation After Converter, Check|Page 3169 > < Oxygen Sensor & O2 Sensor Regulation After Converter, Check|Page 3167
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Possible causes of malfunction if sensor control frequency is too slow:

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Slots or holes in sensor body are blocked

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Sensor vent hole in area of connecting wire is blocked

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Sensor has been overheated (glazed)

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Sensor has been damaged by leaded fuel

Checking Oxygen Sensor wiring for oxygen sensor 1

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Remove inner plenum chamber cover, left.

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Connect VAG 1598/31 test box to control module wiring harness. Motronic Engine Control Module (ECM) -J220- is not connected by this action.

Oxygen Sensor & O2 Sensor Regulation After Converter, Check|Page 3169 > < Oxygen Sensor & O2 Sensor Regulation After Converter, Check|Page 3167