A8L Quattro Sedan V8-4.2L (BVJ) (2007)
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Loosen the hose clamps - 2 - and - 5 - and remove the air guide hose.
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Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector - 2 -.
Checking internal resistance
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Using a multimeter, check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) terminals 1 to 2 for resistance.
Specified value: 1.0 to 20.0 ohms (at approx. 20 °C)
