audi Workshop Repair Guides

Audi Workshop Service and Repair Manuals

Oxygen Sensor Heating|Page 766 > < Oxygen Sensor Heating|Page 764
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Oxygen Sensor: Testing and Inspection
Oxygen Sensor System

(Fault code 2341)

Requirements:

^

engine oil temperature: minimum 80°C (176°F) 

^

differential pressure regulator OK

-

connect multimeter US 1119 to differential pressure regulator, using adaptor VW 1315 A/1

-

run engine at idle

-

disconnect oxygen sensor connector, (arrow) single connector with green wire

-

connect green oxygen sensor wire to ground using jumper wire
^

specification: after approximately 15 seconds, differential pressure regulator current must increase to approximately 10mA

If specification is NOT obtained

-

check wiring between fuel injection control unit and oxygen sensor connector (using wiring diagram)

If NO break in wiring is found

-

replace fuel injection control unit

-

reconnect oxygen sensor green wire

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start engine

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raise engine speed briefly to 3,000 RPM (to warm oxygen sensor)
^

specification: differential pressure regulator current must return to original mA value, then it must fluctuate

If specification is NOT obtained

-

replace oxygen sensor

Oxygen Sensor Heating|Page 766 > < Oxygen Sensor Heating|Page 764