Audi A4 Owners & Service Manuals

Audi A4: Sensors

Audi A4 (B9) 2016-2024 Service Manual / Engine / 4-Cylinder Direct Injection 2.0L 4V TFSI Engine (EA 888 Generation III BZ) / Multiport Fuel Injection / 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-.

A24-11664

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

     Heating, Ventilation & Air Conditioning

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     Refrigerant Circuit, Discharging with Service Station

    Work procedure may vary depending on the type of tools selected (the tool-specific operating instructions should therefore be followed). The refrigerant circuit is to be discharged if parts of the refrigerant circuit are to be removed, if there is any doubt about the quantity of refrigerant i

     Flywheel, Removing and Installing

    Special tools and workshop equipment required Puller - Clutch Module -T40176- Clutch Disc Shaft Spline Lubricant -G 000 100- Sealing Grease. Refer to the Parts Catalog. Removing   Note There is a normal "clicking" in the dual mass flywheel with "LuK" centrifugal pendulum absorber -A-.

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