A8L V8-4.2L (BFM) (2004)
Oxygen Sensor: Service and Repair
Oxygen Sensor After Catalytic Converter, Bank 1
Oxygen Sensor after Catalytic Converter, Bank 1
Removing
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Disconnect electrical connector - 2 - of Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130), bank 1.
2
4-pin connection for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) and Oxygen Sensor (O2S) Heater 1 (behind
Three Way Catalytic Converter (TWC)) (Z29), bank 1.
3
4-pin connection for Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131) and Oxygen Sensor (O2S) Heater 2 (behind
Three Way Catalytic Converter (TWC)) (Z30), bank 2.
To remove Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130), bank 1, back of transmission must be lowered to open
oxygen sensor wire routing.
Lower the automatic transmission.
Remove oxygen sensor after lowering transmission.
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Open all cable ties on transmission for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) electrical wiring connection.
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Remove oxygen sensor using tool from ring spanner set (3337).
Installing
Installation of oxygen sensor is in reverse order of removal. Note the following.