audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Heated Oxygen Sensor and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 5917 > < Heated Oxygen Sensor and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 5915
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Specified value: 0.400 to 0.500 Volts

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Switch the ignition off.

If the specified value was not obtained:

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Replace Heated Oxygen Sensor (HO2S) 3 (G285).

If the specified value was obtained:

Checking wiring

If the manufacturers test box is being used. Perform the following step.

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Install the test box. 

If the manufacturers test box is not being used. Perform the following step.

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Remove the Engine Control Module (ECM) 2 (J624). Refer to => [ Engine Control Module, Removing and Installing ] See: Computers and
Control Systems/Engine Control Module/Service and Repair/Engine Control Module, Removing and Installing.

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Using a Multimeter, check the Heated Oxygen Sensor (HO2S) 3 (G285) electrical harness connector terminals to the Engine Control Module
(ECM) 2 (J624) electrical harness connector T94b terminals for an open circuit.

Heated Oxygen Sensor and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 5917 > < Heated Oxygen Sensor and Oxygen Sensor Regulation Before Catalytic Converter, Checking|Page 5915