Overview - Heated Oxygen Sensor, Vehicles Without SCR System

• Follow the safety precautions when working on the exhaust system. Refer to SAFETY PRECAUTIONS WHEN WORKING ON EXHAUST SYSTEM .

Fig 1: Exhaust Gas Temperature Sensors Components Location

Courtesy of AUDI OF AMERICA, LLC

1. Oxygen Sensor After Three Way Catalytic Converter -G130- with Heater For Oxygen Sensor 1 After Catalytic Converter -Z29-
   • 52 Nm 
   • Equipped depending on the exhaust gas standard
2. Exhaust Gas Temperature Sensor 4 -G648-
   • If equipped depends on the depending on the exhaust gas standard
   • Removing and installing. Refer to EXHAUST GAS TEMPERATURE SENSOR 3 -G495- /EXHAUST GAS TEMPERATURE SENSOR 4 -G648-, REMOVING AND INSTALLING .
3. Exhaust Gas Temperature Sensor 1 -G235-
   • Removing and installing. Refer to EXHAUST GAS TEMPERATURE SENSOR 1 -G235-, REMOVING AND INSTALLING .
4. Exhaust Gas Temperature Sensor 2 -G448-
   • Equipped depending on the exhaust gas standard
5. Bolt
   • 8 Nm 
6. Differential Pressure Sensor -G505-
   • If equipped depends on the depending on the exhaust gas standard
   • Removing and installing. Refer to DIFFERENTIAL PRESSURE SENSOR -G505-, REMOVING AND INSTALLING .
7. Bracket
   • For the Differential Pressure Sensor
8. Exhaust Pressure Sensor 1 -G450-
   • Equipped depending on the exhaust gas standard
9. Bolt
   • 8 Nm 
10. Exhaust Gas Temperature Sensor 3 -G495-
    • If equipped depends on the depending on the exhaust gas standard
    • Removing and installing. Refer to EXHAUST GAS TEMPERATURE SENSOR 3 -G495- /EXHAUST GAS TEMPERATURE SENSOR 4 -G648-, REMOVING AND INSTALLING .
11. Heated Oxygen Sensor -G39- with Oxygen Sensor Heater -Z19-
    • 52 Nm 
    • If equipped depends on the depending on the exhaust gas standard
    • Removing and installing. Refer to HEATED OXYGEN SENSOR -G39-, REMOVING AND INSTALLING .
    • Follow the installation instructions. Refer to INSTALLING 
12. Emissions Control Module