Audi A4: Sensors
Intake Air Temperature Sensor -G42-/Manifold Absolute Pressure Sensor -G71-, Removing and Installing
All procedures are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Sensors; Intake Air Temperature Sensor G42/Manifold Absolute Pressure SensorG71, Removing and Installing.
Mass Airflow Sensor -G70-, Removing and Installing
Removing
- Loosen the hose clamp -3- and remove the air duct pipe.
- Disconnect the connector -2-.
- Remove the bolts -arrows- and the Mass Airflow Sensor -G70--1-.
Installing
Install in reverse order of removal and note the following:
The following information and procedures must be followed exactly to ensure that the Mass Airflow Sensor -G70- works correctly.
Note
- If the air filter element is very dirty or soaked, dirt particles or moisture may have contaminated the Mass Airflow Sensor -G70- and may be causing false mass airflow values. This results in reduced performance, since a lower injection quantity is calculated.
- Check the air filter element on the inside of the air filter housing for debris and clean if required.
- Secure all hose connections with hose clamps that match the ones used in series production. Refer to the Parts Catalog.
Tightening Specifications
- Refer to → Chapter "Overview - Air Filter Housing"
- Refer to → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.21; Charge Air System; Overview - Charge Air Hose Connections.
Fuel Pressure Sensor -G247-, Removing and Installing
All procedures are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Sensors; Fuel Pressure SensorG247, Removing and Installing.
Fuel Pressure Sensor -G247-, Checking
All procedures are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Sensors; Fuel Pressure SensorG247, Checking.
Low Fuel Pressure Sensor -G410-, Removing and Installing
All procedures are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Fuel Injectors; Overview - Fuel Rail with Fuel Injectors.
High Pressure Pump
All procedures and components are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; High Pressure Pump.
Heated Oxygen Sensor
All procedures and components are described under: → Servicing - 4-Cylinder 2.0L 4V TFSI Engine; Rep. Gr.24; Heated Oxygen Sensor.
READ NEXT:
Engine Control Module
Overview - Engine Control Module
1 - Bolt
9 Nm
2 - Mount
For the Engine Control Module -J623-
3 - Engine Control Module -J623-
Before replacing perform the "01 -
Exhaust System, Emissions Controls
Exhaust Pipes/Mufflers
Overview - Muffler
Overview - Muffler, FWD Vehicle
1 - Retaining Loop
Replace if damaged
Exhaust system, installing without tension. Refer to
→ Chapter "Exh
SEE MORE:
Ball Joint, Removing and Installing
Special tools and workshop equipment required
Torque Wrench 1332 40-200Nm -VAG1332-
Torque Wrench 1332 Insert - Ring Wrench - 21mm -VAG1332/7-
Ball Joint Splitter -T40277-
Caution
This procedure contains mandatory replaceable parts.
Refer to component overview and parts catalog prior
Airbag System
Component Location Overview - Airbag System
1 - Pedestrian Protection Trigger 2 -G599-
Overview. Refer to
→ Chapter "Overview - Pedestrian Protection".
2 - Front Passenger Airbag Deactivation Key Switch -E224-
Not for NAR
3 - Front Passenger Airbag
With
