What happens if the lambda probe does not work. Lambda oxygen sensor - probe: malfunctions, check and repair

The exhaust system of vehicles has changed significantly over the past few years, several additional elements have appeared in its design that allow vehicles to be operated without violating international environmental standards.

For example, one of these elements is an oxygen sensor, the signs of a malfunction of which should be known to every car owner. We will consider in detail the purpose, design features and common malfunctions of the lambda probe in the framework of this publication.

What is an oxygen concentration sensor for?

In practice, many owners automotive technology they don't even know it exists. Its purpose is to determine the concentration of oxygen in the exhaust gases and the subsequent transmission of this information to the computer. Based on this, according to the algorithms embedded in the system memory, the fuel-air mixture is corrected for its complete combustion in the cylinders power unit.

The location of the oxygen sensor is the exhaust manifold. On most models, the lambda is mounted directly in the area catalytic converter. Regardless of where the sensor is installed, the correctness of its readings and system performance will not be affected. There are two types of lambda probe:

1. Broadband
2. dual channel

Note that the second type is included in the design of old vehicle models that were produced before the 90s. Everything modern models have a broadband lambda, which captures all deviations with high accuracy to ensure the most correct mixture formation. At the same time, a properly functioning sensor of such a system can actually reduce fuel consumption and ensure optimal speed power unit crankshaft.

Causes of malfunction of the lambda probe

Sensor failure symptoms can vary. Initially, its malfunction is reflected in the quality fuel mixture. For example, its incorrect operation can be triggered by the presence of various deposits. And the most common cause of lambda failure is a violation of its tightness caused by natural wear and tear of the material of its manufacture. Mechanical damage to the oxygen concentration sensor is less common because the element is well protected.

Also, the sensor may work intermittently, or not function at all due to a power failure. contact groups the lambda probe undergoes oxidation, as a result of which the device starts to work incorrectly, transmitting incorrect readings to the computer. This leads to disruption of the mixing process.

Incorrect ignition timing is one of the possible causes of an oxygen sensor failure. Often similar problem occurs on vehicles in the ignition system of which a distributor is provided. In addition, damage to the wiring and problems with spark plugs also leave their mark on the functioning of the lambda probe. This can be recognized by the friction of the engine and its incorrect operation when the crankshaft speed is increased.

Detailed definition of the problem

Among the common signs of a malfunction of the lambda probe are the following:

• increase in fuel consumption;
• the occurrence of jerks while driving;
• a sharp decrease in the power of the power unit;
• unstable idling;
• the appearance of a sharp, toxic smell in the exhaust gases of a car.

It must be emphasized that the symptoms listed above are not always the result of a malfunction of the oxygen concentration sensor. If these symptoms are found, a thorough check of the lambda probe must be performed. Let's consider this process in detail.

Methods for diagnosing a lambda probe

You can test the sensor in one of the following ways:

1. During the visual inspection
2. Checking with a multimeter

Let's start with the first method. First you need to disconnect the connector from the sensor and inspect the condition of the contacts, the integrity of the wires should not be broken, and all connections should be tightly held. After that, we examine the sensor itself. It should not have any deposits and violations of the integrity of the structure.

Soot deposits can be cleaned, its formation is caused by the combustion of an overly enriched fuel mixture, as a result of which lambda patency is impaired. This leads to the fact that the device starts to function incorrectly. The most detrimental to the sensor are lead deposits, which have a silvery-shiny color and are caused by the use of low-quality fuel and engine oil. There is no way to get rid of them, it is recommended complete replacement devices.

The process of checking the lambda probe with a multimeter is not particularly difficult. To implement it, it is necessary to connect the signal wires of the sensor to the tester probes, then start the power unit and keep its speed at 2.5 thousand. Next, we drop the accelerator, pull out the suction and look at the multimeter scale.

The complete failure of the oxygen concentration sensor is indicated by the absence of voltage, or its low value (less than 0.8V). Insofar as design features do not allow to fully restore the lambda probe, a complete replacement of the expired element will be required.

How to replace yourself?

As you can see, in most cases of failure of the lambda probe, its repair makes no sense, so the best solution to the problem would be to replace defective element especially since the process is not complicated.

Must be de-energized before replacement. onboard network car, and then remove the block from the sensor (on some models it can be additionally secured with clamps). Since the lambda is included in the design of the exhaust system, accordingly, the element is constantly working under high loads. It is not always possible to unscrew it the first time. This should be done carefully so as not to damage the threads in the exhaust manifold pipe.

After the failed element is removed from its seat, clean the threads from dirt, install a new lambda probe and screw it in, trying not to overtighten it.

Significance of the oxygen concentration sensor in exhaust system it is impossible not to appreciate the car, since its failure will provoke incorrect operation of the power unit, which is extremely detrimental to its elements. For this reason, you need to learn how to identify its breakdowns in time and correctly.

Lambda probe (oxygen sensor) - one of the important elements in the composition, designed to measure the amount of oxygen in the composition exhaust gases. The sensor, by monitoring the amount of oxygen in the exhaust of the car, affects the quality of the preparation of the fuel mixture of the car, thereby optimizing the work.

The efficiency of fuel combustion lies in a properly prepared fuel mixture (ratio of fuel and air in the power system). If there is more or less air, the toxicity of exhaust gases increases, and catalysts that reduce harmful substances in exhaust gases.

For this reason, it is very important to monitor the condition of the oxygen sensor, since it depends on uninterrupted work ICE car. At the same time, problems arising due to a malfunction of the oxygen sensor are eliminated by diagnosing and carrying out repair work for its replacement.

Read in this article

Lambda probe: types and main components

Most often, the device is installed on the exhaust manifold, in which, when high temperatures and under pressure from the internal combustion engine, exhaust gases enter.

The main components of the oxygen sensor:

• external electrode - a metal element with a ceramic insulator and a tip coated with platinum by spraying, calculates the amount of oxygen in the exhaust gases;
• the inner electrode is a zirconium element with operating temperature up to 1000°C
• heating element - element heating the electrodes to certain temperatures, which allows the oxygen sensor to work at the time of a cold start of the internal combustion engine.

• broadband sensor - has a two-point and pumping ceramic elements (the pumping element, using a certain current strength, pumps oxygen into itself from exhaust automobile gases).
• two-point sensor - has two electrodes and calculates the ratio of excess air in the fuel mixture. The coefficient in ideal conditions should be equal to 1, poor quality fuel and air raises it to a mark, for example, 1.05;

Lambda probe malfunctions: signs and causes

Failure of the lambda probe can lead to a malfunction fuel system, increase in fuel consumption, decrease in traction, etc. A malfunction in the fuel system will lead to a decrease performance characteristics car engine: , deterioration in dynamics, etc.

The service life of the oxygen sensor depends on the operating conditions ICE operation car and averages 60-80 thousand kilometers.

The main signs of a malfunction of the lambda probe:

• excessive fuel consumption;
• uncharacteristic smell from the exhaust pipe, increased toxicity of exhaust gases;
• ICE transition to emergency mode, deterioration in dynamics, decrease in power (very noticeable when driving at high speeds);
• unstable idling, ;

Lambda probe malfunction, causes:

• fuel Low quality(high content of impurities, in particular, lead);
• violation of the integrity of the electrical connection circuits (short circuit);
• mechanical damage or contamination of the oxygen sensor with fuel combustion products due to engine problems;
• temperature overload (interruptions in the ignition system).

It is also worth noting that a breakdown of the oxygen sensor can lead to its operation (violation of the functionality vacuum valve systems).

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Unfortunately, not all car owners know what a lambda probe is and why it is needed. The lambda probe is an oxygen sensor that allows the electronic system to control and balance the correct ratio of air and gasoline in the combustion chambers. It is able to correct the structure of the fuel mixture in a timely manner and prevent destabilization of the engine's working process.

This rather fragile device is located in a very aggressive environment, so its operation must be constantly monitored, since if it breaks down, further use of the car is impossible. Periodic check of the lambda probe will guarantee the stable operation of the car vehicle.

The principle of operation of the lambda probe

The main task of the lambda probe is to determine the chemical composition of exhaust gases and the level of oxygen molecules in them. This indicator should range from 0.1 to 0.3 percent. Uncontrolled excess of this standard value can lead to unpleasant consequences.

With a standard assembly of a car, a lambda probe is mounted in the exhaust manifold in the area of ​​\u200b\u200bthe connection of the nozzles, however, sometimes there are other variations in its installation. In principle, a different arrangement does not affect the performance of this instrument.

Today you can find several variations of the lambda probe: with a two-channel layout and a broadband type. The first type is most often found on old cars manufactured in the 80s, as well as on new economy class models. The broadband type sensor is inherent modern cars middle and upper class. Such a sensor is able not only to accurately determine the deviation from the norm of a certain element, but also to balance the correct ratio in a timely manner.

Thanks to the diligent work of such sensors, the working life of the car is significantly increased, fuel consumption is reduced and stability of holding speed is increased. idle move.

From the point of view of the electrical side, it is worth noting that the oxygen sensor is not able to create a homogeneous signal, since this is prevented by its location in the collector zone, because in the process of reaching the exhaust gases of the device, a certain number of operating cycles can go through. Thus, we can say that the lambda probe reacts rather to the destabilization of the engine, about which it subsequently notifies the central unit and takes appropriate measures.

The main symptoms of a malfunction of the lambda probe

The main sign of a malfunction of the lambda probe is a change in the operation of the engine, since after its breakdown, the quality of the fuel mixture supplied to the combustion chamber deteriorates significantly. The fuel mixture, in fact, remains uncontrolled, which is unacceptable.

The reason for the exit from the working state of the lambda probe may be the following:

• housing depressurization;
• penetration of external air and exhaust gases;
• overheating of the sensor due to poor-quality painting of the engine or not correct operation ignition systems;
• obsolescence;
• incorrect or intermittent power supply that leads to the main control unit;
• mechanical damage due to incorrect operation of the vehicle.

In all of the above cases, except for the last one, failure occurs gradually. Therefore, those car owners who do not know how to check the lambda probe and where it is located at all, most likely, will not immediately notice the malfunction. However, for experienced drivers to determine the cause of the change in engine operation is not difficult.

The gradual failure of the lambda probe can be divided into several stages. At the initial stage, the sensor ceases to function normally, that is, at certain operating moments of the motor, the device stops generating a signal, after which the idle speed is destabilized.

In other words, they begin to fluctuate in a fairly wide range, which ultimately leads to a loss in the quality of the fuel mixture. At the same time, the car begins to twitch for no reason, you can also hear pops that are uncharacteristic of the engine operation, and a warning light on the instrument panel is sure to light up. All these anomalous phenomena signal to the car owner that the lambda probe is not working properly.

At the second stage, the sensor completely stops working on an unheated engine, while the car will signal the driver about the problem in all possible ways. In particular, there will be a noticeable drop in power, slow response when exposed to the accelerator pedal and all the same pops from under the hood, as well as unjustified jerking of the car. However, the most significant and extremely dangerous signal for a lambda probe failure is engine overheating.

If all previous signals indicating a deterioration in the state of the lambda probe are completely ignored, its breakdown is inevitable, which will cause a large number of problems. First of all, the possibility of natural movement will suffer, fuel consumption will also increase significantly and an unpleasant pungent odor will appear with a pronounced shade of toxicity from the exhaust pipe. In modern automated vehicles in the event of a breakdown of the oxygen sensor, an emergency lock may simply be activated, as a result of which the subsequent movement of the car becomes impossible. In such cases, only emergency call tow truck.

However, the worst case scenario is the depressurization of the sensor, since in this case the movement of the car becomes impossible due to the high probability of engine failure and subsequent costly repairs. During depressurization, exhaust gases instead of exiting through exhaust pipe, fall into the intake channel of atmospheric reference air. During engine braking, the lambda probe begins to detect an excess of oxygen molecules and urgently delivers a large number of negative signals, which completely disables the injection control system.

The main sign of sensor depressurization is a loss of power, this is especially felt during high-speed movement, a characteristic tapping from under the hood during movement, which is accompanied by unpleasant jerks and bad smell, which is emitted from the exhaust. Also, a visible sediment of soot formations on the hull testifies to depressurization. exhaust valves and in the field of candles.

How to determine the malfunction of the lambda probe is described in the video:

Electronic check of a lambda probe

You can find out about the state of the lambda probe by checking it on professional equipment. For this, an electronic oscilloscope is used. Some experts determine the performance of the oxygen sensor using a multimeter, however, it can only state or refute the fact of its breakdown.

The device is checked during the full operation of the engine, since at rest the sensor will not be able to fully convey the picture of its performance. In case of even a slight deviation from the norm, it is recommended to replace the lambda probe.

Replacing the lambda probe

In most cases, a part such as a lambda probe cannot be repaired, as evidenced by statements about the impossibility of repair from many automotive manufacturers. However, the overestimated cost of such a node official dealers discourages any desire to acquire it. The best way out of this situation can be a universal sensor, which is much cheaper than its native counterpart and is suitable for almost everyone car brands. Also, as an alternative, you can purchase a used sensor, but with a longer warranty period, or a complete exhaust manifold with a lambda probe installed in it.

However, there are cases when the lambda probe functions with a certain error due to heavy pollution as a result of deposition of combustion products on it. In order to make sure that this is indeed the case, the sensor must be checked by specialists. After the lambda probe has been checked and the fact of its full performance has been confirmed, it must be removed, cleaned and installed back.

In order to dismantle the oxygen level sensor, it is necessary to warm up its surface to 50 degrees. After removal, the protective cap is removed from it and only after that you can start cleaning. Orthophosphoric acid is recommended as a highly effective cleaning agent, which easily copes with even the most persistent combustible deposits. At the end of the soaking procedure, the lambda probe is rinsed in clean water, dried thoroughly and installed in place. In this case, do not forget about lubricating the threads with a special sealant, which will ensure complete tightness.

It is very complex, so it needs constant support for performance and timely preventive maintenance. Therefore, in case of suspicion of a malfunction of the lambda probe, it is necessary to immediately diagnose its performance and, if the fact of failure is confirmed, replace the lambda probe. So everything essential functions of the vehicle will be kept at the same level, which will guarantee the absence of further problems with the engine and other important elements of the car.

Lambda probe is required for normal operation system that provides control and proper formation of the air-fuel mixture in the car. It is located in the exhaust manifold, where the nozzles are connected. But other accommodation options are not excluded.

Constant loads, exposure to an aggressive environment leads to breakdowns, which is accompanied by malfunctions in the operation of the car. It is easier to avoid problems by periodically checking the oxygen sensor, signs of a malfunction can also indicate the need for a service call.

If there are violations in the operation of the oxygen sensor, this affects the performance power plant. Breakdowns are always accompanied by a decrease in the quality of the formed fuel mixture.

Common Causes:

• mechanical damage appears, depressurization is possible due to incorrect operation, off-road driving;
• problems develop, power outages;
• thermal overload, overheating resulting from improper ignition;
• severe pollution due to the use of fuel, which contains a lot of additives that increase octane number;
• air, exhaust gases can enter the system.

Typically, the probe fails gradually, which allows you to identify the problem in time.

Symptoms appear in sequence:

1. There is an unstable idle. The reason is that at certain moments the signal is not generated. Fluctuations can be serious, in a wide range.
2. The quality of the air-fuel mixture decreases. This is accompanied by the appearance of jerks, uncharacteristic pops in the operation of the power unit. The dynamics are deteriorating.
3. The corresponding lamp lights up. dashboard, which is a signal to the owner.
4. If the situation worsens, the device stops working on a cold engine.
5. Power drops noticeably, responsiveness when you press the gas. Claps, jerks appear more often. Engine overheating is not ruled out.
6. Fuel consumption is growing, exhausts acquire a toxic smell.

In such a situation, it is necessary to replace the lambda probe; symptoms of a malfunction should not be ignored. On new car models, emergency mode is activated, which makes it impossible further movement. This eliminates the development of more serious problems with the motor, costly restoration.

How is the sensor checked?

The service life of the sensor depends on the type of device and starts from 50,000 for unheated, 100,000 for heated and 160,000 km for planar. If the first problems appear, you can check the status of the device.

Visual assessment:

1. The presence of soot affects the transmission of signals to the control unit. The reason is overheating, high oxygen content in the fuel mixture.
2. The formation of whitish and grayish deposits indicates a large amount of additives in the fuel, which affects the performance of the unit.
3. Brilliant streaks suggest that the content of lead particles in the fuel has been increased.

To determine the performance, obtain accurate information, professionals use special equipment. If it is not possible to go to a car service, it is enough to clarify how to check the lambda probe with a multimeter. It's easy to do it yourself.

Main stages:

1. The motor is gradually warmed up to 75 degrees.
2. They monitor the gradual increase in speed to 3000, maintaining the performance for 3 minutes. This is necessary to warm up the sensor.
3. Taking a multimeter, the signal wire is connected to the device for verification. The second wire is fixed to the ground. During normal operation of the sensor, the indicators given by the multimeter remain within 0.2 - 1 Volt.
4. During testing, the data should constantly change - when you press on the gas pedal, approach 1 Volt, and when released, quickly fall.

When thinking about how to check the lambda probe, they take into account that if the readings of the device do not change during the process, a voltage of 0.5 volts is maintained during gassing, the unit is probably faulty. With zero data, you need to make sure that the sensor is connected to ground. It is recommended to check the integrity and serviceability of the wiring leading to the ignition switch, relay.

Benefits of using a car service

In a car service, diagnostics are carried out using an electronic oscilloscope. It is advisable to do this after 30,000 km of run, which will avoid unforeseen breakdowns. To check the oxygen sensor lambda probe, specialists observe several important points.

Car service check:

1. The sensor is heated to 300 - 400 degrees for normal operation and measurement of residual oxygen.
2. So, the electrolyte in the design of the device receives conductivity, and the differences in the amount of atmospheric and oxygen in the exhaust determine the appearance of the output voltage.
3. After disconnecting the plug, determine the resistance of the heater. The indicator should remain within 2 - 14 ohms.
4. The voltage applied to the heater is estimated. The best option- 10.5 ohms. The test is performed with the ignition on with the probe connector connected.

The advantage of referring to wizards is the accuracy of determining not only the health, but also the state of the element.

Can the probe be cleaned

If the oxygen sensor breaks down, you cannot do without replacing it, since there are no methods for its restoration. Given the high cost of spare parts, repairs can be accompanied by considerable costs.

But there are other options:

• select a universal sensor, which is much cheaper than the original, suitable for most car models;
• looking for a used part with a guarantee, an exhaust manifold with a sensor installed is also suitable.

But it is not always necessary to change the spare part. It is enough to know how to clean the lambda probe. After all, situations of severe pollution are not ruled out. On the sensitive element, covered with a protective cap, particles of soot and soot can be deposited. Because of this, there are malfunctions and errors in the work. After the plaque is removed, the efficiency of the device is restored.

Subtleties of cleaning:

1. The procedure begins with dismantling, for which the surface of the part is heated to 50 degrees. After removing the sensor, remove the protective cap.
2. In the work, orthophosphoric acid is used, which is able to remove particles of soot, dirt, without damaging the electrodes, important elements. Soaking is carried out for 10 - 20 minutes.
3. A more complex option involves removing the protective cap and washing using the thinnest brush. After removing dirt, the part is washed and dried.

Washing is carried out if it is possible to reinforce the protection, which involves argon welding. The cost of cleaning is much less than replacement. This solution is only suitable for serviceable but contaminated sensors. During subsequent fixing, it is important to lubricate threaded connection mounting paste. When installing a new element, lubrication is not required, the connection is processed at the time of production.

To understand what the lambda probe is responsible for, you should pay attention to the operation of the fuel system. Oxygen sensor- an important element that allows you to maximize the efficiency of the motor on injection machines.

High performance is possible with complete combustion of the air-fuel mixture. Therefore, it is important to determine the optimal proportion of the components. Due to the correct assessment of the oxygen content in the exhaust, the subsequent calculation of the composition of the fuel mixture is performed.

A properly functioning probe provides:

• reduction of fuel consumption up to 15%;
• improving the environmental friendliness of exhaust gases;
• the factory life of the catalyst is preserved;
• excellent dynamics and responsiveness during control are maintained.

The best performance is characteristic of cars with two sensors, where one is located before the catalyst, and the second after it.

When studying the principle of operation of a lambda probe, it is worth considering that the scheme of action differs depending on the type.

Device types:

1. Two-point models in their design include two electrodes. This makes it possible to estimate the coefficient of excess oxygen in the fuel mixture by determining its content in the exhaust. The action takes place during the passage of exhaust gases. Here the first element is sensitive to oxygen. The second is made from zirconium. At the time of passage of the exhaust between the electrodes, the potential is measured. An increase in the indicator means an excess of oxygen.
2. Broadband represent a new type of probes. A voltage of 450 mV is stored here. The device includes ceramic components - two-point and pumping. The latter draws in the oxygen present in the exhaust. In this case, a certain current strength is used. A drop in the oxygen level leads to an increase in voltage, which is accompanied by a corresponding signal from the ECU.

Care, timely diagnostics, troubleshooting allows you to exclude most unforeseen situations, save the factory resource, the functionality of the nodes.

Models of lambda probes are special samples of the oxygen sensor, which is necessary for the correct operation of the electronic system in the combustion chambers. Thanks to this element, the system manages to balance and constantly control percentage between oxygen and gasoline. With the help of a probe, the electronic system constantly corrects the structure of the fuel mixture supplied to the engine, and also warns of destabilization in the engine's working process.

When this fragile device is used in very aggressive environments, it gradually wears out and requires replacement after only two years of use. By replacing the lambda probe, you can avoid engine damage. With a periodic check of the lambda probe, you will have a real guarantor of the stable operation of your car.

How does a lambda probe work?

The main purpose of the sensor is to timely determine the chemical composition of the exhaust gas and determine the level of oxygen percentage in it. In order to avoid problems in the operation of the engine, this indicator must be kept in the range of 0.1-0.3%.

Types of lambda probes

Now in the automotive equipment market, more and more often you can find only 2 variations of the device:

1. The probe is based on a two-channel layout type. This type sensor was mainly used in cars of the 80th year, and is also used on modern cars economy class.
2. Broadband lambda sensor. This type of probe is used as standard in 70% of medium and high class machines. This type of sensor not only accurately determines any deviations from the norm between the elements, but also promptly reports this to the system for instant stabilization of the position.

All samples of modern lambda probes are mounted in a special exhaust manifold, where the hoses and pipes are directly connected. This location of the sensor allows you to get the maximum performance and accuracy of this device.

The main task of any lambda probe is to significantly increase the working resources of the car by reducing fuel consumption and increasing stability in maintaining speed during idling. As a result, this sensor does not give specific values ​​for the parameters of the fuel mixture, but reacts only when the values ​​obtained are destabilized. After detecting a discrepancy with the specified parameters, the sensor transmits information to the central unit, which corrects the ratio of fuel to air.

Advice: if you have replaced the fuel filter on the Priore or another car, be sure to check the correct operation of the probe. If this part is replaced, the correct operation of the instrument may be impaired.

The main symptoms of a malfunction of the lambda probe

Among the signs that allow you to determine in advance whether the probe is working or not, the following are distinguished:

• The appearance of instability during engine operation (the engine starts to pick up speed sharply and also stalls sharply);
• Deterioration in the quality of the fuel mixture pumped by air into the cylinder system (this leads to excessive fuel consumption);
• Uncontrolled and inefficient fuel supply (malfunctions in the operation of the engine and the electronic system of the machine);
• The gradual appearance of intermittency in the engine at idle;
• Decreased efficiency of the engine at maximum speed;
• Problems at work electronic systems(faults in the sensor lead to precarious work engine compartments, since the malfunction signal is transmitted with a delay);
• The presence of periodic "twitching" of the car;
• The appearance of incomprehensible pops during the operation of the engine;
• Untimely (slow) response of car engine systems to pressing the accelerator pedal;
• The appearance of a constantly flashing light about a sensor malfunction on the central instrument panel.

If you have found one or more of these causes in your vehicle, you should consider replacing this device.

Advice: one of the main indicators that the lambda probe is completely out of order is a constant sharp drop in engine power when revving.

Repair or replace the lambda probe?

As well as replacing the fuel pump with a VAZ-2110, so the repair of the lambda sensor should be carried out in a car service. However, in most cases, this spare part is completely replaced, as it simply cannot be further repaired. The problem is the high cost of original sensors from an authorized dealer.

As a result, most motorists decide to switch to using a universal sensor that fits almost any brand of car and costs much less than their native counterparts. In addition, if you want to save money, you can purchase a lambda probe from a showdown. There are used sensors, but they may have a long warranty period. You can also immediately purchase a full-fledged model of the exhaust manifold, in which a lambda probe is already installed.

If the problem is only in the presence of a small error during the operation of the sensor, you can quickly fix it yourself. The main symptoms of a malfunction are associated with its severe pollution during the sedimentation of the combustion products of the fuel. In order to understand whether the tightening of the cylinder head bolts affected the operation of the probe or not, it is enough just to show it to the specialists in the auto center. After the experts confirm the fact that the lambda probe you removed is working, you just have to carefully clean it from dust and burning sediment, and then put it back.

Do-it-yourself lambda sensor repair steps

To dismantle the lambda probe, it will be necessary to first warm up its surface to a limit of 60 degrees. Then carefully remove it and additionally take out the protective cap. After that, you can start cleaning with phosphoric acid, which helps to easily cope with any (even the most persistent) combustible deposits.

Advice: at the end of the work, before installation, do not forget to pre-lubricate the threads with a special sealant to ensure complete tightness of the product.

Video: how to check a lambda probe?