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Bentley Volkswagen.Golf.Jetta.R32.Official.Factory.Repair.Manual.1999-2005

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Measured value (data) blocks<br />

Página 41 de 86<br />

01-222<br />

Appears on<br />

display<br />

High Oxygen<br />

Sensor<br />

(O2S)<br />

learned<br />

values<br />

Possible cause<br />

High learned values at idle, not so<br />

high learned values at part throttle:<br />

Possible unmetered air in area of<br />

intake manifold<br />

Unmetered air between Mass Air<br />

Flow (MAF) Sensor -G70- and<br />

throttle valve<br />

Corrective action<br />

- Check intake air system for<br />

leaks Page 24-121<br />

- <strong>Repair</strong> cause<br />

Fuel injector blocked - Check fuel injectors Page<br />

24-97<br />

Fuel pressure too low<br />

Mass Air Flow (MAF) Sensor -G70-<br />

faulty<br />

Oxygen Sensor (O2S) heating<br />

faulty or Oxygen Sensor (O2S)<br />

contaminated<br />

Unmetered air at exhaust manifold<br />

gasket<br />

- Check fuel pressure control<br />

and holding pressure Page<br />

24-110<br />

- Check Mass Air Flow (MAF)<br />

Sensor -G70- Page 24-52<br />

- Check Oxygen Sensor<br />

(O2S) heating before Three<br />

Way Catalytic Converter<br />

(TWC) Page 24-38<br />

- Check exhaust system for<br />

leaks:<br />

<strong>Repair</strong> Manual, 2.8 Liter<br />

VR6 4V Engine Mechanical,<br />

Engine Code(s): BDF; <strong>Repair</strong><br />

Group 26<br />

http://ebahn.bentleypublishers.com/vw/servlet/Display?action=Next&type=repair&id=...<br />

12/2/<strong>2005</strong>

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