Q7 Quattro V8-4.2L (BAR) (2008)
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If the specified values are obtained:
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End diagnosis and switch ignition off.
If the specified values are not obtained:
Checking primary voltage
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Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector - 2 - or Oxygen Sensor
(O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131) - 4 -.
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Switch the ignition on.
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Using a multimeter, check the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector terminals
3 to 4 for voltage.
