Mustang GT V8-4.6L SOHC VIN X (1998)
Oxygen Sensor: Description and Operation
Catalyst Monitor Sensor
The catalyst monitor sensors react with the oxygen in the exhaust gasses and generate a voltage based on this reaction as follows:
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A low voltage indicates too much oxygen or a lean condition.
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A high voltage indicates not enough oxygen or a rich condition.
The two catalyst monitor sensors are located in the dual converter Y pipe downstream from the catalyst.
