9-3 Arc/Aero (9440) L4-2.0L Turbo (2.0 T) (2004)
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Oxygen Sensor: Description and Operation
Rear Heated Oxygen Sensor (593), T8
Rear Preheated Oxygen Sensor (593), T8
Main task
In order to check the condition of the forward catalytic converter a further oxygen sensor is fitted to the exhaust system after the catalytic converter.This
is called oxygen sensor 2 or O2S 2.
Type
Connection
Pin No. 1-4
