S4 Quattro Wagon V8-4.2L (BHF) (2008)
If the specified values are obtained:
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End diagnosis and switch ignition off.
If the specified values are not obtained:
Procedure for accessing the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131) electrical harness.
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Remove the left side engine compartment cover - 1 -.
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Remove the coolant expansion tank screw - arrow -.
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Disconnect the electrical connector from the Engine Coolant Level (ECL) Warning Switch (F66) and set aside coolant reservoir with coolant hoses
- 1 -and - 2 - connected.
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Disconnect the Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131) electrical harness connector - 1 -.