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What is an Oxygen Sensor?


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Everything you need to know about an oxygen sensor. What is it? How long should it last? Where is it? and more. If you have other auto part questions, see if our other presentations have the answers!

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What is an Oxygen Sensor?

  1. 1. What is an Oxygen Sensor? How to install an oxygen sensor, where are oxygen sensors located, and what is an oxygen sensor?source:
  2. 2. What is anOxygenSensor? source:
  3. 3. What is an Oxygen Sensor?• The oxygen sensor or O2 sensor is a probe that rests in the exhaust of a vehicle. This sensor measures the amount of oxygen that is mixed into the exhaust gases that result from the combustion process. The oxygen sensor or O2 sensor was first invented by the Robert Bosch GmbH company during the late 1960s and is a thimble shaped Zirconia ceramic coated element that reacts to the different levels of oxygen in the exhaust gases. The Robert Bosch Company is a major manufacturer of the oxygen sensors to this day and in many vehicles Bosch is the Original Equipment Manufacturer (OEM) when the vehicle is sold. If an oxygen sensor has reached the end of its life it will begin to give false readings due to oil burn off or other debris coming from the motor. When these units need to be replaced it is a good idea to buy OEM since the electrical impulses will be the same as the original one in the vehicle. source:
  4. 4. OxygenSensor or Air Fuel Ratio Sensor? source:
  5. 5. Oxygen Sensor or Air Fuel Ratio Sensor?• A Critical component of todays modern vehicle is the sensor measuring the exhaust gases. This sensor works with the vehicle electronic control unit (ECU) to constantly maintain the operational efficiency of the engine. If the oxygen content in the exhaust gas is too high (a lean mix) or too low (a rich mix), the sensor is able to transmit this information back to the ECU, which adjusts the air fuel ratio mixture.• Not all vehicles have sensors with the same output characteristics and these sensors are not interchangeable. it is important to confirm sensor type before making the repair.• In vehicles equipped with a heated oxygen sensor, the output voltage changes in accordance with the oxygen concentration in the exhaust gas. The ECU uses this output voltage to determine whether the present air/fuel is richer or leaner than the stoichiometeric air/fuel ratio (14.7:1).• Vehicles equipped with and air/fuel ratio sensor and oxygen sensor may be very similar but thats where the similarity stops. source:
  6. 6. How to Install anOxygen Sensor? source: ygen-sensor-install-procedure.htm
  7. 7. How to Install an Oxygen Sensor?• Terminated Oxygen Sensor Connection Instructions –• Oxygen Sensor threads are typically pre-coated with “high temp” anti-seize” grease. If not, a packet of grease is included with the sensor to coat the threads. Install oxygen sensor into exhaust manifold and torque to 35ft. lbs. On flanged applications install flange to exhaust manifold first, then mount sensor in flange.Note: A copper gasket is bonded to the flange and no additional gasket is required.• CABLE TIES –• Attach correct cable tie to correct position on harness if using the original sensor.• Install the new O2 sensor on vehicle.• Fix cable tie into appropriate mounting holes.• MOUNTING BRACKETS –• Remove oxygen sensor wiring harness assembly.• Install the new bracket on the oxygen sensor harness.• Use original hardware to attach bracket to vehicle.• CONNECTOR CLIPS –• The connector clips should be removed from the vehicle O2 sensor.• Attach the connector clips to the O2 sensor.• Use the original hardware or supplier cable ties to attach new O2 sensor to vehicle.source:
  8. 8. Oxygen SensorLocations source: locating-the-oxygen-sensor.htm
  9. 9. Oxygen Sensor Bank Locationssource:
  10. 10. Oxygen Sensor Life Expectancy• 30,000 to 50,000 miles is typical. However, constantly exposed to the harsh environment found in an automobiles exhaust system, the oxygen sensor must sustain a constant barrage of harmful exhaust gases, extreme heat and high velocity particles and that is under normal operating conditions.• Sometimes contaminants such as coolant, oil, or silicone particles will find their way to the sensor as well. This contaminates the sensor and renders it inoperable. An oxygen sensors life is long in some applications and up to 100,000 mile but whether by contamination or normal use, its effectiveness will inevitably decrease over time.• We recognize the need to keep vehicles running clean. A bad oxygen sensor can cause unacceptable emissions levels, affect performance and ultimately damage the catalytic converter. Make it a point to check oxygen sensors at each tune-up and replace faulty sensors with a new oxygen sensor. source:
  11. 11. What is an Oxygen Sensor? The EndFor more Auto How To Tips visit, you need to purchase an auto part- Visit Call 1-888-907-7225- Or send an email to THANKS source: