Passat Syncro Wagon V6-2.8L (ATQ) (2000)
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Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131- 4-pin harness connector (brown, arrow).
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Connect multimeter for voltage measurement to terminals 3 + 4 of the respective connector to Engine Control Module (ECM) and measure
primary voltage.
Specified value: 0.40 to 0.50 volts
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Switch ignition off.
If specified value is not obtained on one or both Heated Oxygen Sensors (HO2S):
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Test oxygen sensor wires.
If specified values are obtained:
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Replace the respective oxygen sensor:
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Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-, bank 1, item 4
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Oxygen Sensor (O2S) 2 Behind Three Way Catalytic Converter (TWC) -G131-, bank 2, item 11
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Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
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Generate readiness code. Refer to "Monitors, Trips and/or Drive Cycle/Readiness Code, Generating". See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and Readiness Codes
Checking oxygen sensor wires
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Connect test box to control module wiring harness, connect test box for wiring test. Refer to "Scan Tool Connecting/Test Box, Connecting For
Wiring Test".
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool
Connecting/With Generic Scan Tool/Test Box, Connecting For Wiring Test