New Beetle GLS L4-1.8L Turbo (AWV) (2001)
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 basic voltage for oxygen sensor 2
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Remove protective cover -arrows- and separate 4-pin connector (black/brown) -1- to Oxygen Sensor (O2S) after Three Way Catalytic Converter
(TWC) -G130-.
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Connect multimeter with auxiliary cables from VAG 1594 to measure voltage at terminals 3 + 4 (connector to Motronic control module).
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Start engine and measure basic voltage.
Specification: 0.400 to 0.500 V
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Switch off ignition.