S6 Quattro Sedan V10-5.2L (BXA) (2007)
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Disconnect the black Heated Oxygen Sensor (HO2S) (G39) electrical harness connector - 1 -.
Checking primary voltage
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Crank the engine.
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Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector terminals 2 to 6 for voltage.
