A8 Quattro Sedan V8-4.2L (BGK) (2006)
Oxygen Sensor: Testing and Inspection
Oxygen Sensors After Catalytic Converter, Checking Signal Wire and Activation
Oxygen Sensors after Catalytic Converter, Checking Signal Wire and Activation
Component location => [ Heater for Oxygen Sensor before Catalytic Converter, Checking ].
‹› Oxygen sensor signals are monitored via On Board Diagnostic (OBD).
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Check DTC memory. If an oxygen sensor malfunction is displayed.
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Disconnect respective harness connector for oxygen sensor (connector strip bolted to underside of transmission).
2
4-pin harness connector for Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) and Oxygen Sensor (O2S) Heater 1
(Z29) behind catalytic converter, bank 1
3
4-pin harness connector for Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131) and Oxygen Sensor (O2S) Heater 2
(Z30) behind catalytic converter, bank 2
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Perform voltage measurement between terminals 3 and 4 of connector at wiring harness using portable multimeter (VAG1526) (measurement
range 2 V).
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Switch ignition on.
Specified value: 450 ± 50 mV behind catalytic converter.
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Switch ignition off.
If specified value is not obtained, check wire connections.