Oxygen Sensors Overview

WARNING: This page is about a different car, the 2012 Audi Q5, 2011 Audi Q5, 2010 Audi Q5, and 2009 Audi Q5. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Electrical Connectors

Courtesy of AUDI OF AMERICA, LLC

1 - Fuel injectors, Cylinder bank 1

2 - Knock Sensor (KS) 1 -G61-

4 - Heated Oxygen Sensor (HO2S) -G39-

5 - Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) -G130-

Fig 2: Cylinder Bank 2 Oxygen Sensor Electrical Connectors

Courtesy of AUDI OF AMERICA, LLC

1 - Oxygen Sensor (O2S) 2 after catalytic converter -G131-

2 - Heated Oxygen Sensor (HO2S) 2 -G108-

3 - Fuel injectors, cylinder bank 2 and from the fuel pressure sensor -G247-

4 - Knock Sensor (KS) 2 -G66-

Fig 3: Locating Oxygen Sensors - Cylinder Bank 1 (Right)

Courtesy of AUDI OF AMERICA, LLC

1 - HO2S -G39-

2 - Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) -G130-

HO2S -G39-, removing and installing. Refer to Heated Oxygen Sensor -G39- .

Oxygen Sensor (O2S) after Three Way Catalytic Converter (TWC) -G130-, removing and installing. Refer to Oxygen Sensor after Three Way Catalytic Converter -G130- .

Tightening Specifications 55 Nm

Fig 4: Identifying Oxygen Sensors Location, Cylinder Bank 2 (Left)

Courtesy of AUDI OF AMERICA, LLC

1 - Heated Oxygen Sensor (HO2S) 2 -G108-

2 - Oxygen Sensor (O2S) 2 after catalytic converter -G131-

Heated Oxygen Sensor (HO2S) 2 -G108-, removing and installing. Refer to Heated Oxygen Sensor 2 -G108- .

Oxygen Sensor (O2S) 2 after Catalytic Converter -G131-, removing and installing. Refer to Oxygen Sensor 2 after Catalytic Converter -G131- .

Tightening Specifications: 55 Nm