A4 Sedan V6-2.8L (AFC) (1996)
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Aging and contamination can affect the oxygen sensor's response characteristics. Reduced efficiency may be reflected in extended reaction times
(periodicity) or a displacement of the sensor's voltage curve (sensor shift). Either of these will lead to contraction of the Lamda window, ultimately
reducing the efficiency with which the catalytic converter carries out its conversion process.
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A change to the reaction time can be recorded, stored and displayed, however it can not be adjusted.
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Operation of the oxygen sensor is evaluated by checking the voltage that it generates. Short circuits (for instance, due to broken wires) or
malfunction. A malfunction is determined, if a signal is too large or too small or recognized as malfunctioning.
OXYGEN SENSOR G39/G108:
Connector View - Oxygen Sensor G39/G108
Electrical Circuit - Oxygen Sensor G39/G108
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Oxygen sensor G39 is the Pre-Catalyst sensor of Bank 1, G108 is that of Bank 2.
