What does the second oxygen sensor do?
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From: In the Middle
What does the second oxygen sensor do?
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1997 Ranger 4 cylinder.
What does the second oxygen sensor, the one after the cat, do?
Does it affect performance at all, or just an emissions reporter?
.
1997 Ranger 4 cylinder.
What does the second oxygen sensor, the one after the cat, do?
Does it affect performance at all, or just an emissions reporter?
.
Posting Guru
Joined: Jun 2006
Posts: 1,337
Likes: 1
The oxygen sensor is positioned in the exhaust pipe and can detect rich and lean mixtures. The mechanism in most sensors involves a chemical reaction that generates a voltage (see the patents below for details). The engine's computer looks at the voltage to determine if the mixture is rich or lean, and adjusts the amount of fuel entering the engine accordingly.
The reason why the engine needs the oxygen sensor is because the amount of oxygen that the engine can pull in depends on all sorts of things, such as the altitude, the temperature of the air, the temperature of the engine, the barometric pressure, the load on the engine, etc.
The reason why the engine needs the oxygen sensor is because the amount of oxygen that the engine can pull in depends on all sorts of things, such as the altitude, the temperature of the air, the temperature of the engine, the barometric pressure, the load on the engine, etc.
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Joined: Aug 2003
Posts: 318
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From: Huntsville, AL
The sensor after the converter meaaures the amount of gasses unburnt by the converter. It is there to monitor the efficiency of the converter. If the converter is damaged or removed or the sensor goes bad it will trigger the check engine light. The engine will still run fine though.
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