A6 Quattro Wagon V6-3.2L (BKH) (2006)
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) 2 terminals 1 to 2 for resistance.
Specification: 2.5 to 10 ohms (at room temperature).
If the specification is not obtained:
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Replace the Heated Oxygen Sensor (HO2S) (-G130-) (bank 1, sensor 2) or Heated Oxygen Sensor (HO2S) (-G131-) (bank 2, sensor 2) behind
Three Way Catalytic Converter (TWC).
If the specified value is obtained:
Checking voltage supply
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Connect a multimeter between Heated Oxygen Sensor (HO2S) 2 (G108)terminals 1 and 3 for voltage measurement.
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Operate the starter briefly.
Specified value: Battery voltage.
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Switch the ignition off.
If no voltage is present:
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) electrical harness connector terminal 1 to engine ground (GND) for voltage.