audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Heated Oxygen Sensor and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2740 > < Heated Oxygen Sensor and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2738
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‹› Ground (GND) connections between engine/transmission/chassis OK.

‹› Exhaust system between catalytic converter and cylinder head properly sealed.

‹› Coolant Temperature at least 80° C.

Function test

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Perform the function test located in diagnostic mode 06. Refer to => [ OBDMID 13 ($0D): Oxygen Sensor

Monitor Bank 4 - Sensor 1 ] See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/Diagnostic Modes 01 - 09/Diagnostic Mode 06 - Read Test Results For Specific Diagnostic Functions.

If specified values are obtained:

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End diagnosis and switch the ignition off.

If the specified values are not obtained:

Procedure

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Raise the vehicle. 

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Loosen the quick release fasteners - 1 - and -  2 - and remove the noise insulation panel.

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Remove the screws - arrows - and the oxygen sensor electrical harness connector heat shield. 

Heated Oxygen Sensor and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2740 > < Heated Oxygen Sensor and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 2738