S6 Quattro Sedan V10-5.2L (BXA) (2007)
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Disconnect the brown Heated Oxygen Sensor (HO2S) 4 (G286) electrical harness connector- 4 -.
Checking primary voltage
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) 4 (G286) electrical harness connector terminals 2 to 6 for voltage.
Specified value: 0.400 to 0.500 Volts
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Switch the ignition off.
If the specified value was not obtained:
