Golf GL L4-2.0L (AEG) (2001)
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Possible causes of malfunction if O2S sensor control frequency is too slow:
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The slots or holes in O2S sensor body are blocked.
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The O2S sensor vent hole in area of connecting wire is blocked.
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The O2S sensor has been overheated (glazed).
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The O2S sensor has been damaged by leaded fuel.
Checking basic voltage for oxygen sensor 2
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Remove protective cover (arrows) and disconnect 4-pin harness connector (brown) -1- to oxygen sensor after Three Way Catalytic Converter
(TWC) -G130-.
