Oxygen Sensors

The oxygen sensor is among the most sensitive and critical components of your car's engine. Earlier fuel injection systems employed one oxygen sensor in the exhaust system to maintain closed-loop air/fuel mixture control. However, today's engines may use as many as four sensors, which monitor not only exhaust gas oxygen content but catalytic converter efficiency as well. In order to perform these functions properly, the sensors must adhere to OE standards within incredibly close tolerances. PartsAvatar.ca provide world’s leading manufacturer like Denso, Beck Arnley, Bosch, Blue Streak’s oxygen sensor.

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Oxygen Sensor by Walker Products

Oxygen Sensors (O2)

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Descriptions
The oxygen sensor is a device which determines the oxygen content of the exhaust gas. Since the amount of oxygen in the exhaust gas is a very good indicator of combustion efficiency, it is also the best place to monitor the air fuel ratio. Located in the exhaust system, the oxygen sensor produces a voltage proportional to the amount of oxygen in the exhaust versus the air (<150 mV lean & >750 mV rich). This data is used to control the air-fuel mixture through PORT or TFI injectors and carburetors. Sensors are monitored or checked anywhere from 4 to 100 times per second. The air-fuel mixture is thus always moving from rich to lean averaging very close to stoichiometric (ideal) ratios. The ceramic sensor body is contained in a housing which protects it against mechanical effects and facilitates mounting. The ceramic body is made of stabilized zirconium dioxide (zirconia). Its surfaces are coated with electrodes made of a gas-permeable platinum layer. In addition, a porous ceramic coating has been applied to the side exposed to the exhaust gas. This coating prevents contamination and erosion of the electrode surfaces by combustion residue and particulates in the exhaust gases.
Walker Oxygen Sensors are precision made for outstanding performance and manufactured to meet and exceed all original equipment specification and test requirements.
* Improved Engine Response & Performance
* Lower Emissions
* Improved Fuel Economy
* Longer Sensor Life
* Meets OEM Specifications
Malfunctioning and Failed Sensors
Oxygen sensors can fail when the sensor's ceramic element is exposed to certain types of silicone compounds or when an oil-burning engine adds to the sensor becoming oil-fouled. Small amounts of tetra-ethyl lead in the gasoline or over-the-counter fuel additives, which are not "oxygen sensor safe", can also kill an oxygen sensor. Failures can occur instantaneously at the time the contaminant contacts the oxygen sensor, causing a dead sensor, or gradually over a period of time. Gradual deterioration results in a slow sensor which does not react as quickly as it should, causing the catalytic converter to perform less efficiently. This can lead to premature failure of the catalytic converter. Slow oxygen sensors can cause a drop in fuel economy of 10-15%, excessive exhaust emissions and poor drivability. Unfortunately, the symptoms of a slow oxygen sensor are not always obvious to the vehicle owner unless the vehicle fails an emissions test, a decline in fuel economy is noticed or drivability problems occur. A dead sensor can be detected with a relatively inexpensive digital volt-ohm meter. A slow sensor can only be diagnosed by using a digital oscilloscope or scope meter. Most installers will probably not be able to spot an oxygen sensor problem until it is too late and the catalytic converter is already well on its way to failure.
Preventive Maintenance
One-wire and two-wire unheated oxygen sensors should be checked or replaced every 30,000 to 50,000 miles. These sensors rely solely on hot exhaust gas to heat up to operating temperature and are designed to allow a large volume of exhaust gas to make contact with the active ceramic element. These sensors are exposed to contamination, especially the "wide-slot" varieties found on Chrysler, Ford and General Motors vehicles. Heated oxygen sensors have a built-in heater which heats the sensors. Much less exhaust gas needs to contact the ceramic element, making these sensors less prone to contamination. Heated sensors can also be located further downstream (closer to the catalytic converter) which increases their life expectancy. Heated oxygen sensors should be checked or replaced every 60,000 to 100,000 miles.
Diagnostic Trouble Codes (DTC)
When oxygen sensor failure occurs, a DTC is recorded in the Engine Control Unit (ECU) and a Malfunction Indicator Lamp (MIL) is illuminated on the dash, alerting the driver the vehicle has a problem. To diagnose the fault, a code reader or scan tool is connected to the vehicle to read the trouble code. The scan tools can vary in the display of information shown. Some show a definition for the code while others show only a trouble code number. There are generic or standard OBD II codes and vehicle manufacturers use additional codes called enhanced or OEM-specific codes. On many older (pre 1995) vehicles, a trouble code or DTC can be read without a scan tool or code reader by using a manual flash code procedure. After having identified the description using a list of DTC trouble codes, the next step is to diagnose the fault. You must follow the diagnostic procedure to properly diagnose the system, sensor and/or circuit. The trouble code itself does not tell you which part to replace! The scan tools or code readers speak OBD II language, meaning the references to the engine are coded.
* B1 = Bank 1
* B2 = Bank 2
When applying OBD II to oxygen sensors, the codes would then read B1S1. This refers to Bank 1 Sensor 1.Finding Bank 1 is not difficult. The front of the engine will have the accessory pulleys and drive belts, regardless of orientation in the engine compartment. Bank 1, containing cylinder #7, is always the most forward cylinder on the block. There will be a visible difference in the cylinder head location. Sensor 1 will be the pre catalytic position and Sensor 2 would typically be the post catalytic position. In some instances, Sensor 2 can be pre catalytic thus making Sensor 3 post catalytic.
Life Expectancy of an Oxygen Sensor
30,000 to 50,000 miles is typical. However, constantly exposed to the harsh environment found in an automobile's exhaust system, the oxygen sensor sustains a constant barrage of harmful exhaust gases, extreme heat and high velocity particulates. And that is under normal operating conditions! Sometimes contaminants such as coolant, oil or silicone particulates will find their way to the sensor as well. These contaminate the sensor and render it inoperable. An oxygen sensors life is long, in some applications up to 100,000 miles. Whether by contamination or normal use, its effectiveness will inevitably decrease over time. At Walker Products, 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 the oxygen sensors at each tune-up and replace faulty sensors with new Walker oxygen sensors.

Oxygen Sensor by Delphi O2 sensors

Oxygen Sensor by Delphi O2 sensors

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We build Delphi oxygen sensors with a need for speed. Planar sensors have the fastest activation time which is the best in the industry and twice as fast as the nearest competitor's. But wait there's more - three times more planar coverage than our closest competitor.
The Delphi Difference
* Delphi planar technology covers older, conical design sensors
* Smart design consolidates SKUs without using long wires
* Patented protective sensor coating helps prevent contamination
* Validated for all fuel types, including ethanol blends like E85
* OE tested to 150,000 miles, plus 2,000 hours severe thermal testing
OXYGEN SENSORS BEST PRACTICES
The oxygen (O2) sensor, or lambda sensor, operates in an extremely hostile environment. Like a spark plug, it is threaded and screws into its mounting location. Normally the O2 sensor is supplied with anti-seize compound on the threads so it can be more easily removed at the specified change interval. Over time, the anti-seize compound loses its effectiveness and the sensor can become "welded" into its location, making it nearly impossible to remove using normal tools. Using excessive force to remove the oxygen sensor may damage the sensor and surrounding components.
If the sensor becomes seized in its mounting location, a simple 15 minute replacement job can become a much more complex and difficult task. Replacing the O2 sensor within the specified change interval will minimize the possibility of this problem and additional component damage.
* The primary sensor is on the manifold or the exhaust pipe; late-model vehicles also have sensors farther downstream. Be sure you know which one needs to be replaced.
* Unplug the wire connection then spray a penetrating lubricant onto the threaded connection.
* Use an appropriate oxygen sensor tool.
* Most oxygen sensors come with a special electrically conductive anti-seize compound applied to the threads, so it's merely a matter of threading the new sensor into the void left by the old one.
* Use anti-seize compound to coat on the sensor's threads (some oxygen sensors have the anti-seize compound applied at the factory).
* Always check the appropriate reference material for the required torque specification. When there's no torque value given for tightening the new oxygen sensor, treat it much like you would a spark plug. In other words, less is probably better here. Once it's snug, plug the connector into your car's factory wiring to finish the task.

Oxygen Sensor by NGK Canada

Oxygen Sensor

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Overview
NTK is the world's leading supplier of OEM oxygen sensors, supplying more vehicle makers with oxygen sensors than any other manufacturer. NTK oxygen sensors are individually tested to ensure the highest level of quality and reliability. Everyone agrees the amount of pollution produced by motor vehicles should be reduced. In order to encourage reduced emissions governments have progressively introduced tougher exhaust gas emission legislation. Since 1981 the majority of cars and light trucks built throughout the world have been equipped with oxygen sensors. NTK oxygen sensors continuously detect the composition of exhaust gases. As the output from the sensor changes, the ECU instructs the fuel mixing system to alter the mixture. This ensures the air/fuel mixture is always correct and promotes catalyst efficiency. A new NTK oxygen sensor can help lower emissions, improve fuel mileage, improve engine efficiency and extend catalyst life. NTK oxygen sensors are OEM approved and are built with the highest quality materials and craftsmanship to ensure superior quality for your automobile. NTK oxygen sensors meet or exceed original equipment specifications and are equipped with waterproof factory fitted connectors to ensure a perfect fit every time.

Oxygen Sensor by BlueStreak

Oxygen Sensors

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An O2 sensor relays information to the ECM using the oxygen content in the exhaust which enables the ECM to control the air/fuel mixture for efficient combustion. Our sensors undergo 100% testing, ensuring better quality, increased confidence, and improved performance. In addition, Our sensors are thermally conditioned, burning off any contaminants to prolong unit life and performance.
* Manufactured with a stainless steel shell that reduces rusting and provides greater dependability.
* The center ceramic element is composed of Zirconium Oxide, Alumina and Yttrium Oxide.
* The platinum coating is applied using vapor deposition to ensure an even application.
* A Spinel coating on the outer platinum layer prevents solid particles in the exhaust gas from damaging the platinum coating.

Oxygen Sensors by Spectra Premium Industries

Oxygen Sensors by Spectra Premium Industries

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* 100% performance tested to meet vehicle requirements
* Anti-seize pre-applied on all parts
* Protective cap on all models to protect the sensing element from dirt and contamination
* Connectors are fully water proof and resistant to external climate conditions (car wash, puddle spray, dust, etc.)
* Continuous quality testing throughout the manufacturing process
* Electrical connectors are an exact match to vehicle mating harness
* Robust sensing element manufacturing process to ensure product specifications and performance
* All accessories included for installation (rubber grommets, tie wraps, push in clips)
* Limited Lifetime Warranty

Oxygen Sensor by Bosch

Oxygen Sensor

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Premium Oxygen (O2) Sensors
Bosch invented the automotive oxygen sensor, which is also referred to as an O2 sensor or lambda sensor. Our Premium Oxygen Sensors are thimble and planar switching sensors that are designed to meet or exceed OE specifications.
Key Features
* Double laser-welded stainless steel body protects against contamination
* Seared protection tube due to 100% functional quality test
* Pre-coated threads with anti-seize compound right out of the box
* True Direct-fit OE connectors and harness

Premium Wideband A/F (O2) Oxygen Sensors

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Wideband/Air-Fuel sensors perform the same function as a regular O2 sensor, but they precisely measure the amount oxygen in the exhaust rather than just switching between rich (too much fuel, not enough oxygen) and lean (too much oxygen, not enough fuel). Our Wideband sensors use a more sophisticated sensing element that provides a signal to the vehicle's ECU that is proportional to the amount of oxygen in the exhaust.
Key Features
* Advanced Wideband sensing element for exact air/fuel measurement
* Robust sensor design increases sensor longevity
* Seared protection tube due to 100% functional quality test
* 'True Direct-fit' OE connectors and harness
* Pre-coated threads with anti-seize compound right out of the box

Universal Oxygen (O2) Sensors

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Premium Universal Oxygen Sensors with OE SmartLink are quick and easy to install. Each sensor has two-feet length of sensor wire to allow maximum replacement of worn harnesses.
Key Features
* Patented SmartLink(tm) connector system
* No special tools required for installation
* Sealed protection tube due to 100% functional quality test

Oxygen Sensor by Denso

Oxygen Sensors

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Superior Design Maximizes Engine Performance and Fuel Efficiency. DENSO's light duty oxygen sensor started to appear on vehicles with the development of fuel injection systems. The basic job of the sensor is to monitor the air fuel mixture under idle, moderate acceleration and cruise conditions. Under heavy acceleration the oxygen sensor goes into "open loop," which basically means that the engine management computer system ignores the oxygen sensor. Oxygen sensors have a smaller range of limits in detecting and adjusting the difference from an optimum air/fuel ratio. As the automotive industry continues to improve on their standards DENSO is keeping the pace with advancements in our engineering to meet the demands from the industry. Also, as car owners are holding on to their vehicles for longer periods, DENSO continues to make auto parts available for those critical replacement parts for all applications.

Oxygen Sensors

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Oxygen sensors, also known as Lambda sensors or O2 sensors among some vehicle manufacturers, are among the most sensitive and critical components on your car's engine. Earlier fuel injection systems employed one oxygen sensor in the exhaust system to maintain closed-loop air/fuel mixture control. However, today's engines may use as many as four sensors, which monitor not only exhaust gas oxygen content but catalytic converter efficiency as well. In order to perform these functions properly, the sensors must adhere to OE standards within incredibly close tolerances. A malfunctioning or incorrectly calibrated oxygen sensor can hurt driveability and illuminate the malfunction indicator, resulting in costly and time-consuming repairs. DENSO First Time Fit(r) oxygen sensors are designed to meet those tolerances and more. The DENSO oxygen sensor catalog offers one of the most complete product lines in the industry, from Acura to Volvo.
* Robotic Laser Weld
* Porous PTFE Filter
* Allows atmospheric oxygen to enter the sensor without permitting water or engine contaminants to seep into the casing.
* Double Protection Cover
* Maintains proper unit temperature for quicker response times and protects the ceramic element against silicone and lead poisoning.
* Stainless Steel Housing
* Resists corrosion and contamination with a rugged, watertight body.
* Aluminum-Oxide Trap Layer
* Keeps silicone and lead outside the ceramic elient through DENSO's exclusive design, preventing damage to the platinum electrode.
Features:
* Corrosion-resistant stainless steel construction
* PTFE filter blocks efficiency-robbing contaminants
* Refined zirconia element improves sensor response
Benefits:
* Superior design maximizes engine performance while reducing fuel consumption and harmful emissions
* First Time Fit(r) delivers the right part the first time
* Ensures smog test compliance
* Oxygen Sensor Positioning
Left or Right?
Many manufacturer's catalogs identify the left and right side positioning; however, diagnostic tools refer to sensor locations by Bank and Sensor (e.g. Bank 1 Sensor 1). In the diagrams below, the longitudinal engine orientation illustrations depict rear-wheel drive. In cases of transverse engine (front wheel drive), the concepts are the same, however the mounting direction is at a 90 degree rotation left or right from longitudinal. Engine configurations will vary. Please review your service manual or online technical references for accurate engine configurations.
Three-Sensor Exhaust Systems In the case of three-sensor exhaust systems, we may have Bank

Sensor by Acdelco Professional

Sensor by Acdelco Professional

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An ACDelco Professional, premium aftermarket Oxygen (O2) Sensor is the ideal high-quality replacement for your GM vehicle. It is a special feedback sensor on your vehicle's exhaust system. This sensor measures the proportion of oxygen in the exhaust gases. Using this measurement, the engine management computer can adjust the air/fuel ratio near the optimum value of 14.7:1. At this ratio, engine performance, emissions and fuel economy are all optimized. This premium aftermarket replacement oxygen sensor is manufactured to meet or exceed your expectations for fit, form and function.
FEATURES & BENEFITS
* Detect oxygen content in the exhaust gases to optimize emissions and fuel economy
* Coverage available for GM and non-GM applications
* Professional, premium aftermarket replacement
* Provides the performance and dependability you expect from ACDelco
* Manufactured to meet expectations for fit, form and function
PRODUCT FACTS
Function:
Senses oxygen content in the exhaust gas. The Powertrain Control Module (PCM) uses this input to optimize the combustion process.
Signs of Wear & Troubleshooting:
Due to a contaminated sensor probe, broken sensor body, internal sensor failure or external electrical failure, these problems may occur:
* Check Engine light is on
* Poor fuel economy
* Excessive emissions
* Poor engine performance
What It Does:
The Exhaust and Emissions System muffles engine noise while reducing harmful fuel vapors and exhaust pollutants.
Good Maintenance Practices:
With today's computerized engine systems, maintaining your vehicle's exhaust and emissions system is best left to a professional technician.
FAQs:
Can I replace an ACDelco Oxygen (O2) Sensor on my own?
* Yes, but with today's computerized engine systems, maintaining your vehicle's exhaust and emissions system is best left to a professional technician. Is there a problem when my "Check Engine" light turns on?
* Yes, it could be due to a contaminated sensor probe, broken sensor body, internal sensor failure or external electrical failure.
Can ACDelco Oxygen (O2) Sensors help provide better gas mileage for my vehicle?
* Yes, ACDelco Oxygen (O2) Sensors are the primary devices on your vehicle that measure the proportion of oxygen in emission and gases with the amount in outside air. Using this measurement, the vehicle computer can adjust the air fuel ratio to the optimum value of 14.7:1. At this ratio, engine performance, emissions and fuel economy are optimized.
Limited Warranty:
12 Months/12,000 Miles*

ACDelco GM OE O2 SENSOR by Acdelco Professional

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An ACDelco GM Original Equipment Oxygen (O2) Sensor is a GM-recommended replacement for your vehicle's original component and is a special feedback sensor on your vehicle's exhaust system. This sensor measures the proportion of oxygen in the exhaust gases. Using this measurement, the engine management computer can adjust the air/fuel ratio near the optimum value of 14.7:1. At this ratio, engine performance, emissions and fuel economy are all optimized. This Original Equipment Oxygen Sensor has been manufactured to fit your specific GM vehicle, providing the same performance, durability and service life you expect from General Motors.
FEATURES & BENEFITS
* Detect oxygen content in the exhaust gases to optimize emissions and fuel economy.
* GM-recommended replacement part for your GM vehicle's original factory component.
* Offering the quality, reliability and durability of GM OE.
* Manufactured to GM OE specifications for fit, form and function.

PRODUCT FACTS
Find out more about ACDelco GM OE Oxygen Sensors and how they fit into the Exhaust and Emissions System with the product facts below.
Function:
Senses oxygen content in the exhaust gas. The Powertrain Control Module (PCM) uses this input to optimize the combustion process.
Signs of Wear & Troubleshooting:
Due to a contaminated sensor probe, broken sensor body, internal sensor failure or external electrical failure, these problems may occur:
* Check Engine light is on.
* Poor fuel economy.
* Excessive emissions.
* Poor engine performance.
What It Does:
The Exhaust and Emissions System muffles engine noise while reducing harmful fuel vapors and exhaust pollutants.
Good Maintenance Practices:

* With today's computerized engine systems, maintaining your vehicle's exhaust and emissions system is best left to a professional technician.
* When replacing oxygen sensors it is important to use GM OE parts. Parts that do not meet GM OE service specifications, such as element type or cover design, can be detrimental to emission controls. Increased nitrogen dioxide emissions, higher exhaust gas temperature, misfiresor loss of engine power can result from using noncompliant sensors. This can also lead to engine component failure caused by overheating of the catalytic converter.
* It is critical to ensure that you have the right part with the right wire length for your vehicle. Excess wire can be exposed to extreme heat and abrasions that can lead to premature wire failure. ACDelco Oxygen (O2) Sensors use the correct sensor components that GM has validated to engine specific applications.

FAQs:
Can I replace an ACDelco Oxygen (O2) Sensor on my own?
* Yes, but with today's computerized engine systems, maintaining your vehicle's exhaust and emissions system is best left to a professional technician. Is there a problem when my "Check Engine" light turns on?
* Yes, it could be due to a contaminated sensor probe, broken sensor body, internal sensor failureor external electrical failure.
Can ACDelco Oxygen (O2) Sensors help provide better gas mileage for my vehicle?
* Yes, ACDelco Oxygen (O2) Sensors are the primary devices on your vehicle that measure the proportion of oxygen in emission and gases with the amount in outside air. Using this measurement, the vehicle computer can adjust the air/fuel ratio to the optimum value of 14.7:1. At this ratio, engine performance, emissions and fuel economy are optimized.

* Limited Warranty:12 Months/12,000 Miles*