A/C Pressure/Temperature Sensor -G395-, REMOVING AND INSTALLING: Removing

-- Initiate the A/C system basic setting through the Thermal Management Control Module -J1024- and open the power-activated valves through the stored routine "Extract, evacuate and fill the refrigerant circuit" using the Vehicle Diagnostic Tester in the "Guided Fault Finding"  function.

-- Discharge the refrigerant circuit. Refer to Refrigerant Circuit (R134a) (Refrigerant R134a Servicing, Refrigerant Circuit, Working with A/C Service Station) or Working with A/C Service Station (R1234ya) (1 of 2) or Working with A/C Service Station (R1234yf) (2 of 2) .

Vehicles with 6-cylinder Engine 

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-- Remove the left engine cover. Refer to ENGINE COVER, REMOVING AND INSTALLING .

-- Remove the front section of the front wheel housing liner. Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .

-- Check the allocation of the A/C Pressure/Temperature Sensor -G395- -2-. This sensor is installed in the high pressure refrigerant line -A- from the A/C compressor to the valve block (risk of interchanging with other sensors identical in construction). Refer to SYSTEM OVERVIEW - REFRIGERANT CIRCUIT ON VEHICLES WITH HIGH-VOLTAGE SYSTEM (AUDI Q7 E-TRON) .

-- Label the connector -1- and sensor -2- due to the risk of interchanging with other connectors or sensors.

-- Mark the component location of the sensor -2-.

-- Disconnect the connector -1-.

-- Check the refrigerant line and connection -4- for contamination and if necessary clean.

Vehicles with 4-cylinder Engine 

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-- Carefully push the coolant hose -5- from above to the side.

-- Check the allocation of the A/C Pressure/Temperature Sensor -G395- -1-. This sensor is installed in the high pressure refrigerant line from the A/C compressor to the valve block (risk of interchanging with other sensors identical in construction). Refer to SYSTEM OVERVIEW - REFRIGERANT CIRCUIT ON VEHICLES WITH HIGH-VOLTAGE SYSTEM (AUDI Q7 E-TRON) .

TIP

• The sensor -2- is accessible from above on vehicles with a 4-cylinder engine.

-- Label the connector -1- and sensor -2- due to the risk of interchanging with other connectors or sensors.

-- Disconnect the connector -2-.

-- Check the refrigerant line and connection -4- for contamination and if necessary clean.

TIP

• If the connector -2- cannot be disconnected or the sensor -1- cannot be loosened or removed due to the restricted installation space, remove the refrigerant line from the A/C compressor. Refer to ELECTRICALLY-DRIVEN A/C COMPRESSOR, REMOVING AND INSTALLING, VEHICLES WITH 6-CYLINDER ENGINE .

Continuation for All Vehicles 

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This image shows the sensor on a vehicle with a 6-cylinder engine as an example.

-- Loosen and remove the sensor -2-.

-- Seal the open connection -4- with clean plugs from the Engine Bung Set: VAS6122  .