Where is the oxygen sensor? How to test the oxygen sensor?

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2020-01-09 12:20:16

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Often the device fails. Let's look at where in the car the oxygen sensor, how to test its performance. Also learn the symptoms and everything about this sensor.

A Little history

This element can be considered the most popular among all other detectors and sensors in the car. Specialists in automotive diagnostics often have business with him. The oxygen sensors were before, is not new. The first lambda probe represented a sensing element without heaters. The element is heated from the temperature of the exhaust gases. For the heating process needed some time.

how to test oxygen sensor

The years Went by, the environmental situation around the world deteriorated steadily. Therefore, it was necessary to take measures to tighten the harmfulness and toxicity. Requirements for vehicles have become stricter. At this point, the sensor started to develop and evolve. It is equipped with a special heater.

How does the lambda probe

To know how to check the sensor of oxygen concentration, it is necessary to have an idea about how the item works. Working part details – this is a ceramic material, which is coated with a layer of platinum. This element operates at high temperatures.

how to check the oxygen sensor VAZ

The Working temperature can reach 350 degrees or more. Until the sensor warms up to its operating temperature, preparation of the fuel mixture is regulated according to the data obtained from other sensors. The sensor warm up faster, it is equipped with an electric heater. With regard to the principle of operation, it is simple. The exhaust gases envelop the working surface of the sensor, which, in turn, marks the difference between the levels of oxygen in the exhaust and in the environment. Further, the oxygen sensor sends data to the ECU. The latter gives the team preparing the mix.

Where is the oxygen sensor?

So, for motors from "AVTOVAZ" 1.5 litre lambda probe located in the exhaust system. More precisely, on the receiving tube. This element is simply screwed on top, in front of the resonator, or before the spacer in the absence of a pre-muffler.

how to test oxygen sensor

For engines of 1.6 l of “AVTOVAZ” uses a different design of the exhaust system. So, here are two lambda probe. Both were located on the catalyst manifold. These motors are mounted one or two sensors. If the engine is made under the ecological norms "Euro-2", then the item alone. If by "Euro-3", then there will be two lambda probe. So in all vehicles «Lada Priora”. How to test the oxygen sensor? You need to dismantle it and to ensure correct working when using special equipment - a multimeter.

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Why the lambda probe is out of order?

The Reasons why these elements fail, may be different. This is often the depressurization of the housing. Also possible damage due to the penetration into the sensor, external oxygen and exhaust gases. One of the typical reasons – it is overheating.

prior is how to test oxygen sensor

Occurs due to poor Assembly of the engine or improper operation of the ignition system. Also, the sensor often breaks down due to obsolescence, incorrect supply or unstable power supply. Possible mechanical damage.

Symptoms

Often there is an abnormality in which the main reason – the oxygen sensor. How to check it depends on the symptoms of the fault. Let's consider them. The main symptom, which suggests that the lambda probe is faulty – changes in the operation of the motor. The fact that after the failure of the sensor the quality of the fuel mixture deteriorates significantly. Simply put, for the preparation of a mixture of one not responsible - the fuel system is uncontrolled. In all cases, except that the last sensor fails gradually, not at once.

how to check the sensor of oxygen concentration

Many owners do not know where is oxygen sensor, how to test its performance, etc. They will not know that the item is faulty. But for experienced car owners to understand and determine why the change in motor work will not be difficult. The process of failure of the sensor can be divided into several main stages. In the first stages, the item just ceases to work normally – at some moments of operation of the engine the lambda probe just transmit the readings. This destabilizes the work of the motor float rpm, there is an unstable idling. The speed can vary within substantial ranges. This will eventually lead to the loss of the correct ratio of the fuel mixture.

how to test oxygen sensor

At the moment the machine can twitch without a good reason, heard uncharacteristic clapping, also the lamp on the dashboard. All these signals saying that the lambda goes down and is already working properly. You must know how to test the oxygen sensor in order to fix the problem. Next, the operation of the oxygen sensor completely stops ata cold motor. This car will strongly inform the owner that the problem exists. For example, will fall much power, there will be slow response on the gas pedal. From under the hood claps, the car jerks. But the most significant and dangerous signal – overheating of the motor. If you completely ignore all the signals that are screaming failure, a complete failure of the sensor is ensured. How to check the oxygen sensor, the driver often doesn't know. Therefore, the malfunction can cause major problems.

If nothing is done

The First thing to suffer is himself a motorist, as it will increase fuel consumption, and exhaust gases are toxic smell with sharp tones from the pipe. In the case of modern cars with lots of electronics, which knows how to check for a faulty oxygen sensor, activated the lock. In such a situation, any movement by car will be impossible. But the worst option – this depressurization. The machine generally will not go with either labor will start. It is fraught with a complete motor failure. In case of depressurization of all gases is the exhaust pipe gets in the air intake. When you execute engine braking, the probe will lock the toxicity and will give negative signals. This completes disabling the injection system. The main symptom of depressurization – loss of engine power. You can feel it while driving at speed. Also from under the hood you will hear banging and popping, the smell. Previously, motorists needed to know how to adjust the carburetor. Now, nothing has changed – it is necessary to remember, how to test the oxygen sensor (VAZ-2112 is not an exception).

Diagnostics electronically

To find Out what is the status of the lambda probe is possible only using specialized equipment. Suitable for verification and the electronic oscilloscope. Experts know how to check the probe and other methods (multimeter), but you can find only working element or broken.

oxygen sensor how to check

Before you check for a faulty oxygen sensor, you must run the motor. In the quiescent state, the probe cannot completely show all your working pattern. If there is a slight divergence from norms, the item is better replaced by a new one.

Error

If there is a problem with the sensor, the vehicle system will make every attempt to inform. You can plug a special device into the diagnostic connector, and everything will be visible. Car electronics knows exactly how to test the oxygen sensor. Even automobiles are equipped with a diagnostic system. The error begins with the numbers on P141 pp. 130 – all codes related to the lambda. Most often there are messages which are associated with malfunctions in the circuits of heating. This comes on the ECU the wrong information. You can try to find the broken wire, but it is better to replace the oxygen sensor. How to test it for performance, you already know.


Article in other languages:

AR: https://tostpost.com/ar/cars/20593-where-is-the-oxygen-sensor-how-to-test-the-oxygen-sensor.html

BE: https://tostpost.com/be/a-tamab-l/38235-dze-znahodz-cca-datchyk-k-slarodu-yak-praveryc-datchyk-k-slarodu.html

DE: https://tostpost.com/de/autos/37888-wo-ist-die-regelsonde-wie-berpr-fen-sie-die-regelsonde.html

ES: https://tostpost.com/es/coches/37838-donde-se-encuentra-el-sensor-de-ox-geno-c-mo-probar-el-sensor-de-ox-ge.html

HI: https://tostpost.com/hi/cars/22265-where-is-the-oxygen-sensor-how-to-test-the-oxygen-sensor.html

JA: https://tostpost.com/ja/cars/20240-where-is-the-oxygen-sensor-how-to-test-the-oxygen-sensor.html

KK: https://tostpost.com/kk/avtomobil-der/38643-onda-datchik-otteg-alay-datchik-otteg.html

PL: https://tostpost.com/pl/samochody/40204-gdzie-znajduje-si-czujnik-tlenu-jak-sprawdzi-czujnik-tlenu.html

PT: https://tostpost.com/pt/carros/39843-onde-est-o-sensor-de-oxig-nio-como-testar-o-sensor-de-oxig-nio.html

TR: https://tostpost.com/tr/arabalar/35098-nerede-oksijen-sens-r-nas-l-kontrol-oksijen-sens-r.html

UK: https://tostpost.com/uk/avtomob-l/39036-de-znahodit-sya-datchik-kisnyu-yak-perev-riti-datchik-kisnyu.html

ZH: https://tostpost.com/zh/cars/42732-where-is-the-oxygen-sensor-how-to-test-the-oxygen-sensor.html






Alin Trodden - author of the article, editor
"Hi, I'm Alin Trodden. I write texts, read books, and look for impressions. And I'm not bad at telling you about it. I am always happy to participate in interesting projects."

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