Passat GLS Wagon L4-1.8L Turbo (AUG) (2001)
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Disconnect 6-pin harness connector (black) to Heated Oxygen Sensor (HO2S) - G39- (item no. 2).
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Set multimeter for resistance measurement and connect it to terminals 3 + 4 at connector for oxygen sensor. Check oxygen sensor heater for
continuity.
Specification: 2.5 to 10 Ohms (at room temperature)
If a short circuit is found in the oxygen sensor heater:
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Replace Heated Oxygen Sensor (HO2S) - G39-.
If oxygen sensor heater has continuity:
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heck voltage supply and wiring.
Checking voltage supply and wiring