Cooper S (R53) L4-1.6L SC (W11) (2004)
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Oxygen Sensor: Testing and Inspection
Pre - O2 Sensor in Operation
-
If the exhaust has a lower oxygen content (rich mixture), there will be a large ion "migration" through the sensor generating a higher voltage (950
mV).
-
If the exhaust has a higher oxygen content (lean mixture), there will be a small ion "migration" through the sensor generating a lower voltage (080
mV).
-
This voltage signal is constantly changing due to combustion variations and normal exhaust pulsations.
