volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Oxygen Sensor O2S 1 Before Catalytic Converter Heater, Checking|Page 667 > < Oxygen Sensor O2S 1 Before Catalytic Converter Heater, Checking|Page 665
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‹› Battery voltage at least 12.5 volts.

‹› All electrical consumers such as, lights and rear window defroster, switched off.

‹› Vehicles with automatic transmission, shift selector lever into position " P" or "N".

‹› A/C switched off.

‹› Ground (GND) connections between engine/transmission/chassis OK.

‹› Ignition switched off.

Test procedure

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Perform a preliminary check to verify the customers complaint. Refer to --> [ Preliminary Check ] See: Powertrain Management/Computers and
Control Systems/Testing and Inspection/Scan Tool Testing and Procedures/Preliminary Check

Start diagnosis

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Remove the right vehicle floor cover - arrows -. 

Checking internal resistance

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Disconnect the Oxygen Sensor (O2S) Behind Three Way Catalytic Converter (TWC) (G130) electrical harness connector -  arrow -.

Oxygen Sensor O2S 1 Before Catalytic Converter Heater, Checking|Page 667 > < Oxygen Sensor O2S 1 Before Catalytic Converter Heater, Checking|Page 665