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Oxygen Sensors - How They Work and Why They Fail

Properly functioning oxygen sensors are key to keeping your engine running smoothly. So how can you test it?

Oxygen Sensors: What You Need to Know

Learn about This Important Part and How to Test It

The car oxygen sensor is a small part that plays a big role in keeping an engine running efficiently. If you suspect the O2 sensor in your car may be malfunctioning, it’s a good idea to test it to check that it’s working properly. In this 27-minute free webinar, you will learn the main points to consider when testing an oxygen sensor.

Why Are Car Oxygen Sensors Important

This webinar is about oxygen sensors, which are also known as O2 sensors or lambda sensors. These sensors are crucial to the proper functioning of a vehicle’s engine. A failing oxygen sensor can cause serious issues with fuel economy and emissions. In this webinar, we’ll focus on the Lambda test, which is a diagnostic test for oxygen sensors.

What Do You Need to Test an Oxygen Sensor

We will show you the Lambda probe, which is the tool required to perform a Lambda test. You’ll learn how the lambda probe works and which cables correspond to what function. We’ll tell you the O2 sensor fault symptoms, plus two key signals to check when testing the O2 sensor in a car. We’ll provide expert recommendations on what actions to avoid during the test to prevent damage. We’ll clarify one common feature of the test which is often misunderstood as a malfunction.

How To Test an Oxygen Sensor in a Car

We will walk you through the process of how to test a lambda sensor, including where to connect the probes and what measurements to look for. We will explain how to interpret measurements like the Lambda factor and fluctuations in temperature. As the narrator provides the instructions, a mechanic will demonstrate the process on screen and point to relevant areas in the engine bay. You’ll learn how the test should be conducted differently for petrol and diesel-engined vehicles. We will teach how to find the correct place to connect the probe’s cables.

Valeo Oxygen Sensors

Valeo makes a wide variety of sensors, including oxygen sensors, car intake air temperature sensors, and air temperature sensors. Download the technical service bulletins from the webinar’s download section to learn why you should replace a defective oxygen sensor, what are the common causes of sensor failure, how oxygen sensors work, and what are the main types of sensor. If you’re looking for oxygen sensors or any other specific part, visit the Tech@ssist part finder portal and search by model, VIN, or part number. You can also find our other webinars on the Tech@ssist home page.

What You Will Learn in Our Webinar

In this webinar, you will learn:

  • How to use the calibration rig on an actuator
  • What formula to use for correct actuator calibration
  • What measurements to use for correct actuator calibration

Afterwards, you can download materials like technical service bulletins on Valeo Dual Dry Clutches, including tooling requirements and actuator calibration. You may want to print out the actuator calibration bulletin for reference when performing the calibration.

 

 

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