Removing Lambda Sensor Upstream Of Catalytic Converter

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2013 Porsche 911, 2012 Porsche 911, 2011 Porsche 911, 2010 Porsche 911, and 2009 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Observe precautionary measures when working with lambda sensors!
→ 2400AW00 PRECAUTIONARY MEASURES WHEN HANDLING LAMBDA SENSORS .
Disconnect cable plug for the lambda sensor lines.
Pull connector -2, 6- for the lambda sensors with the blue boot on the right and left out of the bracket -3, 4- and disconnect plug connection.

Fig 1: Identifying Lambda Sensor Plug Connections
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Information
- Always expose oxygen sensor wire far enough for it to be able to turn when unscrewing the sensor.
Expose the lambda sensor wire.
1. 3.1. Expose the lambda sensor wire on cylinder bank 4-6.
  Unclip lambda sensor wire -2- with the blue boot out of the brackets -3, 4, 5- .
  
  Fig 2: Identifying Lambda Sensor Wire 4-6
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. 3.2. Expose the lambda sensor wire on cylinder bank 1-3.
  Unclip lambda sensor wire -2- with the blue boot out of the brackets -3, 4, and 5- .
  
  Fig 3: Identifying Lambda Sensor Wire 1-3
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Remove lambda sensors upstream of catalytic converter.
1. 4.1. Loosen and unscrew lambda sensor 4-6 -4- upstream of catalytic converter -8- using an open ring wrench Nr.98 and torque wrench -92/1- .
  
  Fig 4: Identifying Lambda Sensor Upstream Of Catalytic Converter 4-6
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. 4.2. Loosen and unscrew lambda sensor 1-3 -3- upstream of catalytic converter -9- using an open ring wrench Nr.98 and torque wrench.
  
  Fig 5: Identifying Lambda Sensor Upstream Of Catalytic Converter 1-3
  Courtesy of PORSCHE CARS NORTH AMERICA, INC.