Passat Syncro Wagon V6-2.8L (ATQ) (2000)
Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter -G131-, bank 2 4-pin harness connector (brown) (arrow).
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Check oxygen sensor heater on connector to Heated Oxygen Sensor (HO2S) terminals 1 + 2 for continuity
Specification: max. 200 Ohms
If specified value is not obtained:
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Replace appropriate Heated Oxygen Sensor (HO2S).
If expected value is not obtained:
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Check Ground (GND) connection of appropriate oxygen sensor heater.
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Switch ignition off.