Oxygen sensor VAZ-2110: where is, possible malfunctions, how to check

Control of the operation of internal combustion engines of modern cars is carried out with the help of special electronic devices (controllers). One of the main tasks of the controller is the regulation of the composition of the fuel mixture supplied to the cylinders of the power unit. It depends on it fuel consumption, stability of the engine, as well as its power and traction properties. To do this, the electronic control unit collects and analyzes information coming from various sensors. Based on the received data, the ECU sends the necessary commands to the appropriate devices.

In this article, we'll talk about what the VAZ-2110 oxygen sensor is and is for. Also we will consider its design, possible malfunctions and ways of diagnostics.

What is an oxygen sensor

0 – это электронное устройство, предназначенное для определения количества чистого кислорода в выхлопных газах. The oxygen sensor VAZ-211 0 is an electronic device designed to determine the amount of pure oxygen in the exhaust gases. What is it for? First of all, in order to reduce the amount of harmful impurities contained in the exhaust gases. The maximum reduction in their concentration is possible only by creating a so-called stoichiometric fuel mixture (14.7 kg of air per 1 kg of fuel). To achieve this proportion, it is necessary to ensure the actual supply of air in the specified amount. It turns out this is not always, and for many different reasons. The ideal ratio of the amount of actually incoming air to the theoretical indicator is usually denoted by the Greek letter λ (lambda). That's why the oxygen sensor is also called a lambda probe.

How the lambda probe works

, как, в принципе, и других инжекторных автомобилей, состоит из двух электродов: внешнего (платинового) и внутреннего (циркониевого). Structurally , the oxygen sensor VAZ-2110 , as, in principle, and other injection vehicles, consists of two electrodes: external (platinum) and internal (zirconium). The first contact with the surrounding air, and the second - with the exhaust gases of the machine. The sensor readings are based on the potential difference between the electrodes: the larger it is, the less oxygen in the exhausts.

For normal operation of the lambda probe, it needs to warm up to 300-400 degrees Celsius. This temperature is achieved by a special electric heating element integrated in the sensor.

Immediately after starting the engine, the electronic control unit regulates the composition of the mixture, based on the readings of other sensors (mass air flow, opening of the damper, coolant temperature, etc.). When the lambda probe warms up and comes into operation, the controller starts to refer to its data as well.

Types of oxygen sensors for VAZ-2110

фирмы «Бош» с маркировкой 0 258 005 133. После 2004 года, когда «десятки» стали оборудоваться новыми системами впрыска "Январь 7.2" и "Бош M7.9.7", производители начали устанавливать модернизированный лямбда-зонд ВАЗ – 0 258 006 537. Его основным отличием от предыдущей модификации являлся керамический нагреватель, который потреблял гораздо меньше электроэнергии, но прогревал устройство намного быстрее. In the first injector modifications of the VAZ-2110 the Bosch oxygen sensor with the marking 0 258 005 133. was used. After 2004, when the "tens" began to be equipped with the new injection systems "January 7.2" and "Bosch M7.9.7", the manufacturers began to install Modernized lambda probe VAZ - 0 258 006 537. Its main difference from the previous modification was a ceramic heater, which consumed much less electricity, but heated the device much faster.

Today, Bosch produces seven different modifications of 12 and 18 W lambda probes. In addition to the energy consumption indicators, these sensors are almost the same, except the number of contacts.

Where is the oxygen sensor

In cars VAZ-2110 the lambda probe can be placed in different ways. In older versions of the "ten" it is attached to the top of the receiver tube (next to the resonator). расположен прямо на выпускном коллекторе. In the new 1.6-liter engines , the VAZ-2110 oxygen sensor is located directly on the exhaust manifold.

The latest modifications of the "ten" are equipped with two lambda probes. установлен до катализатора, а второй – за ним. The first oxygen sensor VAZ-2110 (16 valves) is installed before the catalyst, and the second - behind it.

The resource of the lambda probe and the reasons for its failure

On average, VAZ lambda probe can work conscientiously for 5-7 years or 120-150 thousand km of run. But this is subject to normal operation of the car, excluding permanent overload, low-quality fuel and off-road driving.

«десятки» – это критический перегрев, возникающий при использовании плохого горючего, попадание внутрь устройства различных технологических жидкостей, отложение нагара на рабочих элементах, а также естественный износ, от которого не застраховано ни одно устройство. The main malfunctions of the oxygen sensor are "tens" - this is a critical overheating, which occurs when using a bad fuel, ingress of various process fluids into the device, deposition of carbon on the working elements, as well as natural wear and tear, which is not insured by any device.

Symptoms of a lambda probe

Whatever it was, but if the lambda probe VAZ went out of order, it will either have to be repaired or changed. But before proceeding to these works, it is necessary to make sure that the oxygen sensor caused the engine to malfunction. To begin with, consider the main symptoms of its breakdown. These include:

• Unstable operation of the power unit (the turns are floating, the engine stalls after the start);
• Decrease in dynamics and traction properties of the car;
• Increase in fuel consumption;
• Characteristic crackle, coming from the sensor;
• The appearance on the instrument panel of an appropriate signal indicating an error in the engine operation (when scanning the computer, an error with code P0131 is detected).

How to check the lambda probe

To diagnose the lambda probe is best with the use of specialized equipment in the service center. This is the only way to accurately determine its malfunction, as well as to find out the reasons why it failed.

At home, only an approximate diagnosis can be carried out. And to hold it will help an ordinary multimeter, included in the voltmeter mode. кислородный датчик, потребуется прогреть двигатель автомобиля до рабочей температуры. Before you test the oxygen sensor, you will need to warm up the engine of the car to operating temperature. Then the motor should be muffled and the probe connector disconnected. We connect the signal wire of the sensor to the positive probe of the multimeter. We connect the negative contact of the device to the "mass" of the car. We start the engine, load it up to 2500 rpm and look at the readings of the device. исправен и причину следует искать в другом месте. If the voltage value is close to 0.9 V, the Lambda probe VAZ is sound and the cause should be looked elsewhere. But if the voltmeter reading is below 0.8 V, the sensor most likely has failed.

The new oxygen sensor VAZ-2110: the price of the question

Having determined the malfunction of the lambda probe, you can not bother with attempts to repair it, and immediately purchase a new one. Naturally, if you do not mind its cost. How much is the new VAZ-2110 oxygen sensor? , в зависимости от модификации зонда, варьируется от 1500 до 3500 рублей. The price , depending on the modification of the probe, varies from 1500 to 3500 rubles. Expensive? Well, what do you want, platinum and zirconium are not cheap metals.

Is it possible to repair

In some cases, a failed sensor can be tried to recover. But this option is applicable only for those cases where the cause of its breakdown are deposits of carbon on the working elements of the device. Combustion products disrupt the normal operation of the lambda probe, distorting the output signal. In order to independently get rid of carbon deposits on the working surfaces of the sensor, we will need:

• Hacksaw for metal;
• Vise;
• Gas burner (it is possible to use a household gas stove burner);
• Clean glass container;
• orthophosphoric acid;
• Soldering iron, flux and solder.

First, disconnect the sensor connector and unscrew it from the seat. Now it needs to be sawn, because the probe does not understand. Gently clamp it in a vice and saw off both protective caps to get to the ceramic rod. When this is done, heat the sensor over the burner. This is necessary for burning out the deposit. In no case should you try to remove combustion products mechanically. So you just do harm to the device.

After the heating procedures, you can continue to restore the working elements of the sensor by placing it in orthophosphoric acid. It perfectly dissolves carbon deposits. But do not overdo it. Keep the probe in acid is not recommended for more than 30 minutes.

At the end of the work, the sensor must be assembled. To do this, soldered caps must be soldered to the body using a soldering iron, flux and solder.

Dummy - an alternative version of the lambda probe

There is another way that allows not to purchase a new oxygen sensor. And it is used by the majority of car owners who are faced with the problem of damaging the lambda probe. The essence of this method is to deceive the electronic control unit by slipping it in place of a working sensor with its emulator (snag).

You can implement such a simple plan in three ways:

• To install the sensor in such a way that its working elements have minimal contact with the exhaust gases;
• To make changes in the software of the electronic engine control unit;
• Change the voltage value on the signal line of the oxygen sensor.

In the first case, a special bushing (spacer) is installed between the lambda probe and the receiver tube or collector. This is done in order to remove the sensor contacts from the exhaust gases. The potential difference in this case decreases on the electrode of the probe, which it notifies the electronic control unit.

You can also reflash the computer by installing the modified software on it, which will not react to the output of the oxygen sensor. In order not to damage the electronics of the car, it is recommended to conduct similar procedures with the involvement of specialized specialists.

The controller can also be deceived by changing the voltage on the sensor signal line. For this purpose, various self-made electronic devices are used, which are installed in the rupture of the conductor.