volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5884 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5882
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‹› 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 --> [ Engine Control Module, Replacing ] .

Start diagnosis

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Remove the engine cover with air filter.

Checking internal resistance

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Disconnect the Heated Oxygen Sensor (HO2S) (G39) electrical harness connector - 1 -.

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Using a multimeter, check the Heated Oxygen Sensor (HO2S) (G39) terminals 3 to 4 for resistance. 

Specified value: 2.5 to 10.0 ohms (at approx. 20° C)

If the specification was not obtained:

Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5884 > < Heated Oxygen Sensor (HO2S) G39 and Oxygen Sensor Control Before Catalytic Converter, Checking|Page 5882