volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Oxygen Sensor and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 1753 > < Oxygen Sensor and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 1751
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Check resistance for sensor heater at connector to oxygen sensor terminal 1+2.

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Specified value: 1.0 to 20.0 Ohms (at room temperature)

If specified value is not obtained:

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Replace Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) -G130-:

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Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. See: Powertrain Management/Computers
and Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/With Generic Scan Tool/Diagnostic Mode 4: Reset/Erase
Diagnostic Data

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Generate readiness code. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Monitors, Trips, Drive Cycles and
Readiness Codes

If specified value is obtained:

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Check Ground (GND) activation of oxygen sensor heater.

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Connect test box to control module wiring harness. connect test box for wiring test. See: Powertrain Management/Computers and Control
Systems/Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/Scan Tool Connecting/Test Box, Connecting For Wiring Test

Vehicles with engine code AEG

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Check wires between test box and 4-pin connector to Engine Control Module (ECM) for open circuit according to wiring diagram.

Terminal 2 + socket 28

Wire resistance: max. 1.5 Ohms

Vehicles with engine code AVH, AZG, BDC, BEV, BGD

Oxygen Sensor and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 1753 > < Oxygen Sensor and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 1751