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How Does it Work /
Oxygen Sensor
How an Oxygen Sensor Works
The oxygen sensor in your vehicle is an electronic component that is designed
to measure levels of oxygen in the engine exhaust. Typically, the oxygen sensor
is mounted to the exhaust system tube, with the sensor part inside the tube.
This measures the oxygen mixture by generating a small amount of electricity due
to the difference in atmosphere, oxygen and carbon dioxide. The
PCM monitors this voltage and
adjusts the fuel system and
engine timing accordingly.
Oxygen Sensor
The oxygen sensor is in continuous communication with the engine control unit
giving it the information necessary to adjust fuel intake and ignition timing
for correct combustion. When the engine is cold the oxygen sensor is not as
active, but will become so after the engine coolant has reached a specific
temperature. Early sensors used this time to “heat” up so that the reactive
material within could work properly, to correct this condition the oxygen sensor
has been constructed with a 12 volt heater element. This heater allows the
sensor to read at maximum efficiency quicker. When the throttle is wide open and
under max load the oxygen sensor will go full voltage until normal operating
conditions return. Typically changing an oxygen sensor when necessary is a
simple process. Most solutions to oxygen sensor problems result in changing the
oxygen sensor, but always be sure there are no vacuum leaks present in the
intake system, this can give a false oxygen sensor trouble code Due to the
severe usage the sensor endures, it is common for most sensors to last
approximately 75,000 miles, however it is not uncommon for an oxygen sensor to
last only 40,000 miles depending on your
driving habits and vehicle
conditions.
Oxygen Sensor Cut Away
Over the life of the oxygen sensor soot build up can occur on the sensing probe
which can result in inaccurate readings. This can cause your engine to run
rough and consume excessive fuel. Remove the sensor and replace it with a new sensor.
How Does it Work
/ Oxygen Sensor
Check Manufacturer Specific Oxygen
Sensor Questions and Answers
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