A4 Quattro Cabriolet V6-3.2L (BKH) (2007)
Oxygen Sensor: Testing and Inspection
Oxygen Sensors After Catalytic Converter, Checking
Oxygen Sensors after Catalytic Converter, Checking
This procedure is used to diagnose Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) or Oxygen Sensor (O2S) 2 Behind
Three Way Catalytic Converter (TWC) ( G131).
‹› When servicing the electrical harness connector of the Oxygen Sensors (O2S) Behind Three Way Catalytic Converter (TWC), use only
gold-plated terminals.
Special tools, testers and auxiliary items required
‹› Multimeter.
‹› Wiring diagram.
Test requirements
‹› The Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) fuse OK.
‹› The Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) (G131) fuse OK. Refer to => [ Oxygen Sensor Heater after Catalytic
Converter, Checking ] See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General
Diagnostics/Component Tests (VAG Code Tests)/Oxygen Sensor Heater After Catalytic Converter, Checking.
‹› Battery voltage at least 12.5 volts.
‹› All electrical consumers such as, lights and rear window defroster, switched off.
‹› Vehicles with automatic transmission, selector lever in position " P" or "N".
‹› A/C switched off.
‹› 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
Perform a function test of the Heated Oxygen Sensors (HO2S). Refer to ADD LINK
If specified values are obtained:
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End diagnosis and switch the ignition off.
If the specified values are not obtained:
Test procedure
-
Perform a preliminary check to verify the customers complaint. Refer to => [ General Diagnosis ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/General Diagnosis.
Start diagnosis
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Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector - 2 -.