S6 Quattro Sedan V10-5.2L (BXA) (2007)
-
Disconnect the black Heated Oxygen Sensor (HO2S) (G39) electrical harness connector - 1 -.
Checking internal resistance
-
Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G39) terminals 3 to 4 for resistance.