Home Generator The oxygen sensor is out of order. Checking the lambda probe. Lambda probe malfunctions: symptoms and causes

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The oxygen sensor is out of order. Checking the lambda probe. Lambda probe malfunctions: symptoms and causes

The lambda probe is an oxygen controller. It is used to control and balance the proportions of air and fuel when generating combustible mixture... Correct functioning of the element will prevent destabilization of the motor's working process. To determine the cause of the breakdown, you need to know the signs of a malfunction of the lambda probe.

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External signs and causes

If the lambda probe heating system or the device itself in the car does not work, the symptoms of a malfunctioning condition will be as follows:

The power unit has become less stable. Turnovers can spontaneously increase and decrease. The motor often stalls, especially at traffic lights.
The quality of the combustible mixture, which is pumped with air into the cylinder system, has decreased. If the sensor is damaged, it will cause excessive consumption of fuel.
The fuel supply has become ineffective, fuel enters the combustion chambers uncontrollably. This can lead to malfunctions in the operation of the unit, as well as the electronic system of the car.
Over time, intermittent operation of the motor may appear when operating on idle... At maximum - efficiency ICE operation will also be less low.
There are problems in the functioning of electronic systems. Due to the need to repair the sensor, separate compartments power unit will be unstable. This is because there is a delay in impulse fault signals.
While driving vehicle began to twitch. Especially when the car is going uphill.
When the engine is operating at any speed, pops may appear.
The engine began to react with deceleration to pressing the gas pedal. Acceleration occurs, but not immediately.

One of the important symptoms is the lighting of the Check Engine indicator or the failure lamp of the oxygen controller on dashboard auto.

The reasons why the performance of the oxygen sensor will be impaired may not arise immediately, therefore, the failure of a part occurs in several stages:

At the first, it starts to function unstably. Periodically, the signal from the device disappears, information is supplied in a wide range. This leads to a deterioration in the quality of the combustible mixture, as well as unstable work revolutions. At the initial stage, the car jerks when driving, pops uncharacteristic for the operation of the internal combustion engine appear, and a malfunction indicator may light up on the tidy.
On next step the lambda probe stops functioning on a cold engine until the unit warms up. Symptoms will be similar, only more severe. The engine power of the car may decrease, there will be a response when you press the gas pedal. As a result, this can lead to overheating of the internal combustion engine.
In the third stage oxygen sensor usually fails completely. The power of the power unit drops even more, this is clearly manifested when driving at high speed. An unpleasant and pungent odor appears from the muffler.

The reasons that may be associated with a breakdown of the oxygen sensor:

Depressurization of the device case has occurred. Because of this, exhaust gases and air began to get inside.
Overheating of the controller. The reason may be due to malfunctions in the ignition system or improper tuning of the power unit.
Long-term exposure to external factors. This reason can be attributed to natural wear and tear, since any oxygen sensor fails over time.
The working surface of the oxygen sensor is covered with combustion products that block its operation. This is usually due to the regular use of low quality fuel.
There was a power failure or damaged wiring to the central control unit.
Mechanical damage to the device. As a result strong blow internal elements of the controller may collapse along the body. This often occurs with regular off-road driving.

The channel "Online store of auto parts" spoke about the causes of malfunctions in the operation of oxygen controllers.

How to check with a multimeter

Before diagnosing the oxygen sensor itself, a check is performed on its heating device.

The tester can check the operation of the heating component of the oxygen sensor:

The diagnostic device switches to the resistance parameter measurement mode.
The probes of the device are connected to the contacts of the heater. These elements are usually made of a cable with a large cross-section.
The contacts of the heating device are ringing.
If the heating element is working, then the resulting resistance value will be less than 10 ohms. If this parameter is higher, then the electrical heating device is out of order and needs to be replaced.

The tester check is done like this:

Find the mounting location for the controller under the hood of your vehicle.
Connect the multimeter probes to the signal outputs of the sensor or electrical circuits. On the tester itself, a measurement limit of 2 volts is set.
At the next stage, it is necessary to artificially create a situation of a re-enriched combustible mixture. To do this, you can use the rebase method, periodically pressing the gas pedal. Alternatively, you can remove the pressure sensor connector.
Then the readings given by the tester are read. Ideally, they should be from 0.8 volts, this indicates the health of the oxygen sensor.
It is necessary to artificially create a lean mixture situation. To do this, you can make an air leak by slightly loosening the clamp of the air duct. With a lean mixture, the tester should read no more than 0.2 volts.

V_i_t_a_l_y talked about diagnosing the oxygen controller using a multimeter.

Other diagnostic methods

If there are signs of a malfunction of the lambda probe, you can use to check the functionality computer diagnostics... It allows you to monitor the operating parameters of the oxygen sensor online.

For diagnostics, you can use an oscilloscope. If the check showed that the lower limit of the device drops to zero volts, then the controller is working, but soon it will need to be changed. If the curve of the time dependence of the voltage at the signal contact is more smooth, then it is time to replace the sensor.

It is correct to start diagnostics of four-contact oxygen sensors with a visual inspection; it is recommended to perform this procedure every 10 thousand kilometers. The controller is dismantled from the manifold for testing, and you cannot use the WD-40 tool or brake fluid, as their contact with the work surface will lead to its breakage. If applicable special means when unscrewing the coked threads, before removing the device, their remnants are removed.

Assess the color as well as the condition of the oxygen controller working area. If traces of soot are visible on it, this indicates an over-enriched combustible mixture in the engine. Its presence leads to contamination of the device, therefore, to ensure higher performance, the soot must be removed. A touch of gray either white indicates the use of additives in motor fluid or fuel. The presence of a shiny coating indicates that the concentration of lead in the fuel used is exceeded. If the plaque is intense, then the sensor cannot be repaired, it must be replaced.

Instructions for repair and replacement of the sensor

You can replace or restore the controller with your own hands.

How to dismantle the sensor

Removing the device, regardless of the model of the machine, is done as follows:

Warm up the surface of the part to about 60 degrees. To do this, you can use a regular lighter or burner. Warming up will make it easier to remove the device from the seat.
Disconnect the wires connected to the part.
Unscrew the oxygen sensor carefully. It is not recommended to use special means for dismantling.
Remove the protective cap.

Diman Stepanenko spoke about self-dismantling lambda probe.

Cleaning and soaking

There are two options for oxygen sensor recovery:

the first - using phosphoric acid;
the second - with phosphoric acid and a burner.

It should be noted that phosphoric acid or another similar agent belongs to the category of hazardous substances. When working with a substance, it is important to remember the safety rules. Do not allow acid to enter the mucous membranes or inside the body.

The first way

This method cannot be called accelerated, since the consumer needs to get full or at least partial access to the ceramic surface of the device. This component is hidden behind a protective cap made of metal, it is not easy to dismantle it. Do not use a hacksaw to remove it as it will damage the work surface. Dismantling is carried out using a lathe - at the base of the oxygen sensor, cut off the protective cap with a cutter. Cutting is done next to the thread.

If it is not possible to use the machine, it is allowed to use a file. It will not work to completely remove the cap with this tool, then small windows about 5 mm in size can be made on it. For cleaning, use about 100 ml of phosphoric acid. If it is not available, a rust converter can be used.

Device recovery:

Pour the liquid into a glass container. You can use jars, glasses, etc.
Dip the oxygen sensor core into the container. The controller must not be completely immersed in liquid. Wait about twenty minutes.
Remove the sensor from the container, rinse its base with tap water. Wait for the device to dry completely.
If it was not possible to remove the dark plaque on the core the first time, repeat the procedure. It is necessary to ensure that the element becomes metallic again.
If after several attempts to perform high-quality cleaning did not work, then to enhance the effect of the product, you can use a brush. It moistens and processes the base of the device. As a result, plaque should be removed. If the protective cap has been removed, the brush is not needed. It is better to use a toothbrush instead.
After cleaning has been completely completed, the sensor is flushed. If the cap has been removed, it must be reinstalled after restoration. For this, argon welding is used.

When using this method, keep in mind:

If the device is heavily soiled, then twenty minutes will not be enough to restore it. In case of critical blockages, the soaking procedure can be extended up to three hours. In some situations, cleaning may take an entire night, at least eight hours.
After cleaning, you need to check how effectively the procedure was performed. Diagnostics will take some time for the car owner to understand how the car behaves and how much fuel it "eats". If the malfunction indicator remains on the tidy, then it was not possible to repair the controller.
If the machine is equipped with a sensor, the protective cap of which is double-sheathed, it will not be possible to file a hole in it. To solve the problem, it is necessary to soak the device in acid or other means with the cap itself.

The oxygen controller cleaning process is shown by Alexander Sabegatulin.

Second way

To rebuild the controller, you will need the same acid, as well as a gas burner or stove. When using a household stove, give preference to a small-sized hotplate.

Cleaning procedure:

The lid is removed from the hotplate. Then it is turned over and installed back, with a slight offset to the side. It is necessary to install the cover so that it covers the pipe itself from the ingress of liquid inside.
The fire is lit on the burner.
The core of the lambda probe must be dipped in a container with acid, then take it with pliers and heat it over a fire. This will cause the acid to boil and splatter. Greenish salt appears on the working surface of the device.
Wait until the substance has completely boiled away. Flush controller clean water, and then repeat the cleaning procedure. These steps must be followed until the controller is completely shiny. This may take ten minutes or more. Before further installation, the thread of the lambda probe must be treated with graphite grease, which will prevent the oxygen sensor from sticking to the threaded hole.

Installing a lambda probe

The installation of the device is carried out in the reverse order:

A protective cap is installed on the sensor.
Wires are connected to the device.
The controller is installed in seat and twists.

How to make a corrector (blende) lambda probe?

There are several types of correctors for oxygen controllers. Mechanical device is the simplest and most affordable in terms of the execution of correctors. It is necessary to carve a special adapter into which the lambda probe is installed, as well as a mini-catalyst. After that, the assembled device is mounted in the regular place of the machine's muffler.

If the catalyst device or the oxygen sensor installed after it breaks down, a signal will be sent to the control unit. The module will be warned that the exhaust gases contain harmful substances the volume of which exceeds the permissible value. The control unit will perceive this event as an emergency and will increase the fuel supply to enrich the air-fuel mixture.

When installing such a corrector, exhaust gases will flow through a small hole in the adapter into the catalyst device. The latter is filled with ceramic dust with a catalytic layer. The concentration of harmful substances in the exhaust gases will be lower. The control module will perceive this as the correct operation of the controller and the standard catalyst device. The manufacture of trompe l'oeil is carried out using a lathe and a circuit; the use of steel or bronze is allowed as a material.

Mechanical corrector circuit for lambda probe

Universal drawings that can be found on the net may not be suitable for making a lambda probe trick for specific model auto, you need to look for a proven option.

Making an electronic trick for a controller:

Using the SprintLayout program and a printer, a layout drawing and an arrangement of circuit elements are printed. Printing is done on glossy paper.
When sending a file for printing for the K1 layer, select 100% black. In the program, check the box opposite the Mirror and Outline items. All other layers are removed.
Then the next layer is sent to print. For the M2 layer, black is indicated. The check mark in front of the Mirror item is removed, but it is left in front of the second element. The other layers are removed.
When performing the task, it is recommended to use foil-coated textolite. It must be one-sided, and its thickness will be at least 1 and not more than 2 mm.
When the printout is in hand, it must be transferred to the LM324 board using an iron. The board itself is cut taking into account the dimensions, and printouts must be made along its contour. After cutting out, attach the diagram to the drawing, the dimensions must be exactly the same.
Sand the copper layer using fine-grained sandpaper. With the help of fuel or solvent, the board is cleaned.
Then you need to transfer the printout with the tracks to the working surface of the board. The printed layer of elements is installed on the back (copper surface). For this, foil paper is applied to the board and warmed up with an iron; the procedure takes no more than 10 minutes. When warming up, the surface of the iron must be pressed against the board as much as possible. As a result, the toner should be reprinted from the foil surface onto the circuit. If the paper is lightweight, the tracks will show through. The problem can be corrected with a permanent black marker.
The next step will be etching, which will require ferric chloride or sodium perchlorate.
Then holes are drilled on the board, the elements are soldered.

Connecting all components on the trick board

What is the price?

The cost of the device will vary depending on the manufacturer and brand of the car.

Video "Installing a mechanical blender lambda probe"

The channel "Oil change and other types of maintenance" spoke about self-installation mechanical corrector of the oxygen sensor.

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

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

For this reason, it is very important to monitor the condition of the oxygen sensor, since the smooth operation of the car's internal combustion engine depends on it. In this case, problems arising from a malfunction of the oxygen sensor are eliminated by diagnosing and conducting renovation works to replace it.

Read in this article

Lambda probe: types and main components

Most often, the device is installed on the exhaust manifold, into which exhaust gases are supplied from the internal combustion engine at high temperatures and under pressure.

The main components of the oxygen sensor:

external electrode - a metal element with a ceramic insulator and a tip coated with platinum by sputtering, calculates the amount of oxygen in the exhaust gases;
inner electrode - zirconium element with working 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 the 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 automobile exhaust gases).
point-to-point sensor - has two electrodes and calculates the excess air ratio in the fuel mixture. The coefficient under ideal conditions should be equal to 1, low-quality fuel and air raise it to a mark, for example, 1.05;

Lambda probe malfunctions: symptoms and causes

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

The service life of the oxygen sensor depends on the operating conditions of the car's internal combustion engine and averages 60-80 thousand kilometers.

The main symptoms of a lambda probe malfunction:

excessive consumption of fuel;
uncharacteristic smell from exhaust pipe, increased toxicity of exhaust gases;
transition of the internal combustion engine to emergency mode, deterioration of dynamics, decrease in power (strongly noticeable when driving at high speeds);
unstable idle,;

Lambda probe malfunction, reasons:

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

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

Lambda probe emulator and catalyst trickery: what you need to know. If a catalyst error is lit, an oxygen sensor snag or an ECU firmware.

On a hot float engine speed: possible reasons... Diagnostics of floating speed on a warm engine. Useful Tips and recommendations.

The writing of this material was prompted by an abundance of questions on the Internet forum related to a misunderstanding (or misunderstanding) of the principle of operation of an oxygen sensor, or a lambda probe.

Oxygen sensor: general to specific

First of all, you need to go from general to specific and understand the operation of the system as a whole. Only then will the correct understanding of the work of this very important element ECM and diagnostic methods will become clear.

In order not to delve into the jungle and not overload the reader with information, I will talk about the zirconium lambda probe used on VAZ cars. Those who wish to understand more deeply can independently find and read materials about titanium sensors, about broadband oxygen sensors (SDK) and come up with methods for testing them. We will talk about the most common sensor, familiar to most diagnosticians.

Once upon a time, an oxygen sensor was just a sensing element, without any heater. The sensor was heated by exhaust gases and took a very long time. Strict toxicity standards required a quick entry of the sensor into full operation, as a result of which the lambda probe acquired a built-in heater. Therefore, the VAZ oxygen sensor has 4 outputs: two of them are a heater, one is a mass, and one is a signal.

Of all these conclusions, we are only interested in the signal one.

The voltage shape on it can be seen in two ways:

scanner
motor tester by connecting the probes and running the recorder

The second option is preferable. Why? Because the motortester makes it possible to evaluate not only the current and peak values, but also the shape of the signal and the rate of its change. The rate of change is precisely the characteristic of the sensor's health.

So, the main thing: oxygen sensor reacts to oxygen ... Not on the composition of the mixture. Not the ignition timing. Not for anything else. Only for oxygen. This must be realized without fail.

The physical principle of operation of the sensor is described in many books devoted to electronic systems engine control, and we will not dwell on it.

A reference voltage of 0.45 V is supplied to the signal output of the sensor from the ECU. To be completely sure, you can disconnect the sensor connector and check this voltage with a multimeter or scanner. Everything is fine? Then we connect the sensor back.

By the way, on old foreign cars, the reference voltage “floats away”, and as a result, the normal operation of the probe and the entire system is disrupted. Most often, the reference voltage with the sensor disconnected is higher than the required 0.45 V. The problem is solved by selecting and installing a resistor that pulls the voltage to ground, thereby returning the reference voltage to the required level.

Further, the sensor operation scheme is simple. If there is a lot of oxygen in the gases washing the sensor, then the voltage across it will drop below the reference 0.45 V, to about 0.1 V. If oxygen is low, the voltage will be higher, around 0.8-0.9 V. The beauty of a zirconium sensor is that it "jumps" from low to high voltage when the oxygen content in the exhaust gases corresponds to the stoichiometric mixture. This remarkable property is used to maintain the composition of the mixture at the stoichiometric level.

Oxygen sensor test method

Once you understand how an oxygen sensor works, it is easy to understand how to test it.

Suppose the ECU issues an error related to this sensor. For example, P0131 " Low level oxygen sensor signal 1 ". You need to understand that the sensor displays the state of the system, and if the mixture is really poor, then it will reflect this. And replacing it is absolutely pointless.

How do we find out if the problem lies in the sensor or in the system? Very simple. Let's simulate this or that situation.

For example, if you complain about a lean mixture and a low voltage at the signal output of the sensor, increase the fuel supply by pinching the backflow hose. Or, in its absence, splashing gasoline from a syringe into the intake manifold. How did the sensor respond? Did you show an enriched mixture? If yes, then there is no point in changing it, you need to look for the reason why the system is supplying an insufficient amount of fuel.
If the mixture is rich and the probe displays this, try to create an artificial suction by removing some kind of vacuum hose. Has the sensor voltage dropped? This means that it is absolutely serviceable.
The third option (rather rare, but taking place). We create a suction, squeeze the "return" - and the signal on the sensor does not change, it hangs at the level of 0.45 V, or changes, but very slowly and within small limits. That's it, the sensor is dead. For he must be sensitive to changes in the composition of the mixture, quickly changing the voltage at the signal output.

For a deeper understanding, I will add that with a little experience, it is easy to establish the degree of wear of the sensor. This is done according to the steepness of the transition fronts from rich mixture to the poor and back. A good, serviceable sensor responds quickly, the transition is almost vertical (watch, of course, with a motor tester). A poisoned or simply worn-out sensor reacts slowly, the transition fronts are flat. Such a sensor needs to be replaced.

Understanding that the sensor reacts to oxygen, another common point can be easily grasped. In case of misfire, when a mixture is thrown from the cylinder into the exhaust tract atmospheric air and gasoline, the lambda probe will react to the large amount of oxygen contained in this mixture. Therefore, it is very possible for a misfire to generate an error indicating a lean air / fuel mixture.

I would like to draw your attention to one more important point: possible leakage of atmospheric air into the exhaust tract in front of the lambda probe.

We mentioned that the sensor responds to oxygen. What will happen if there is a fistula in the issue before it? The sensor will respond to high oxygen levels, which is equivalent to a lean mixture.

Note: Equivalent

In this case, the mixture can be (and will be) rich, and the probe signal is mistakenly perceived by the system as the presence of a poor mixture. And the ECU will enrich it! As a result, we have a paradoxical situation: the error is "poor mixture", and the gas analyzer shows that it is rich. By the way, the gas analyzer in this case- very good helper diagnostician.

How to use the information extracted with its help is described in the article "Gas analysis and diagnostics".

Oxygen sensor: conclusions

It is necessary to clearly distinguish between a malfunction of the ECM and a malfunction of the lambda probe.
You can check the probe by monitoring the voltage at its signal output with a scanner or by connecting a motortester to the signal output.
By artificially simulating a lean or, conversely, enriched mixture and tracing the probe's reaction, one can make a reliable conclusion about its serviceability.
By the steepness of the voltage transition from the "rich" state to the "poor" state and vice versa, it is easy to conclude about the state of the lambda probe and its residual resource.
The presence of an error indicating a defect in the lambda probe is by no means a reason to replace it.

Service life of lambda probes at normal conditions operation ranges from 50 to 250 thousand kilometers, depending on the type of sensor.

Listed below are the most common causes of their premature failure.

If an error is detected in the operation of the lambda probe, then it is necessary to conduct a complete external inspection and check its operation:

1. Check the integrity of the electrical connector and sensor wires.
2. Carefully inspect the sensor itself for dents, cracks and other mechanical damage.
3. Check the cleanliness of the contact block of the electrical connector, as well as the absence of traces of corrosion on it.

Typical malfunctions of lambda probes, their causes and remedies

← If the engine is running normally and the fuel burns out completely, then there is no plaque on the working tip of the sensor, and its surface has a dull matte dark gray color.

Poisoning of the sensor's sensing element.

If you observe the following changes on the probe tip, then you should pay attention to the need for additional repair work.

← Antifreeze poisoning. In case of contamination with antifreeze, grainy deposits of gray or greenish color with white streaks appear on the tip:
→ Check the engine cooling system and especially the cylinder head gasket for leaks and repair. Replace the lambda probe.

← Oil poisoning. In case of excessive consumption of oil by the engine, deposits of gray or black color appear on the tip:
→ Check engine for wear or oil leakage and repair. Replace the sensor.

← Soot poisoning. If the ignition and / or fuel system malfunctions, dark brown or black soot appears on the sensor.
→ Check fuel system, measure the toxicity of the exhaust. The sensor will have to be replaced.

← Poisoning with leaded gasoline. One or two fillings with leaded gasoline will result in shiny, dark gray deposits on the sensor.
→ Replace leaded petrol with unleaded petrol and replace the sensor.

← Poisoning with fuel additives. Frequent use of various fuel additives or recent engine repairs using silicone sealants will result in red or white deposits on the sensor.
→ Clean the fuel system and engine. Replace sensor.

Burnout of the heating element.

If the tip of the sensor looks quite healthy, its wires and electrical connector are in order, then the sensor failed as a result of a burnout of the heating element. The heating element could burn out for the following reasons:

1. Temperature shock as a result of water ingress on the sensor due to the forcing of deep puddles or washing the engine compartment.
2. Defective wiring.
3. Problems with the catalyst.

→ Attention! In the event of a burnout of the heating element, the catalyst should be checked, since if the problems with the catalyst persist, the new lambda probe will fail again within a short time.

Corrosion of the contact group of the electrical connector.

Water ingress into the electrical connector (on the contact group) due to the forcing of deep puddles or washing the engine compartment.
→ Try to drive through puddles in a calm mode, without splashes, especially if the car has normal ground clearance.

Mechanical damage to the sensor, sensor cable, electrical connector.

... "Curved" hands of auto mechanics who dismantle / mount the sensor when carrying out other work or parts located near the sensor. Damage occurs as a result of the fall of the sensor on a hard surface, the fall of something hard and heavy (key, head, part, bolt, etc.) onto the sensor or electrical connector.
→ There is hardly any help here, but be careful!

Incorrect laying of the lambda probe cable after re-installation. As a result, the cable insulation melts due to its contact with hot parts of the engine, or, in the case of the second sensor, its breakage during movement.
→ Check the correct wiring after installing the sensor.

Replace lambda probe

If the oxygen sensor is defective, there are several solutions to the problem. One of them is to change the lambda probe sensor. You can do this yourself by buying a new part in a specialized store or car service. Pay attention to the markings on the old probe. With exactly the same should be a new probe.

If you are not sure if you can handle it, contact a specialist. Where can a lambda probe be replaced? In any car service for little money. Experts will do the job efficiently. For the next 50,000-100,000 km, the original oxygen sensor will work perfectly.

Improves engine performance;

A significant disadvantage of such a solution is the price. The cost of a new lambda probe reaches 25,000 rubles. If the car's catalyst is disconnected or knocked out, replacing the lambda probe will not help. Software shutdown will help - chip tuning.

Clear lambda probe

Often soot accumulates on the oxygen sensor, and combustion products settle inside. This prevents him from working at full strength. The car loses traction, decreases maximum speed and fuel consumption is increasing. One of the solutions to the problem is to clean the lambda probe.

Phosphoric acid cleans the lambda probe in 15-25 minutes. Then rinse the device with warm water and dry thoroughly.

Types of trickery for a lambda probe

Disabling lambda probes programmatically using chip tuning will bring pleasant bonuses:

The indicators of power and torque will increase;
Fuel consumption will decrease (compared to emergency mode);
Low traction will improve;
The gas pedal will become more responsive;
The overall dynamics of the car will improve, acceleration will become more frisky;
Gearbox shifts will be smoother;
The engine operation is optimized with the air conditioner on, the car will stop "dull".

Programmed shutdown of lambda probes is carried out by ADACT partners in Russia and the CIS countries.

You cannot drive with a faulty oxygen sensor. The car loses its dynamics, the fuel consumption increases. Therefore, car owners change, clean, install tricks or programmatically turn off the lambda probe. Which is the best way? Sorted out the pros and cons of each.

Replace lambda probe

Replacement takes place necessarily on a cooled engine and the ignition off. To begin with, the wires are disconnected from the old device. Then the old probe is disconnected with a wrench, and a new one is put in its place. Work must be done carefully, without ripping off the thread.

The advantage of installing a new oxygen sensor

Saves fuel from 5 to 15%. Deterioration of the sensor affects fuel consumption, so installing a new one will return it to normal;
Improves engine performance;
With 100% certainty, notifies about the failure of the catalyst;
Reduces the emission of harmful substances.

Clear lambda probe

Often soot accumulates on the oxygen sensor, and combustion products settle inside. This prevents him from working at full strength. The car loses traction, the maximum speed decreases and the fuel consumption increases. One of the solutions to the problem is to clean the lambda probe.

How is the oxygen sensor cleaned:

Inspect the probe carefully before cleaning it. If there is damage or the structure is deformed, then the malfunction is unlikely to be due to contamination. If there is no damage, the lambda probe can be cleaned.
You will need phosphoric acid, which is good at eroding scale and removing soot. Do not use mechanical cleaning tools: iron brush, sandpaper, file, etc. You will damage the precious metal layer and the sensor will become unusable.
Remove the oxygen sensor from the car and place in acid. To speed up the process, take a soft brush and apply the liquid evenly over the entire surface.
Phosphoric acid cleans the lambda probe in 15-25 minutes. Then rinse the device with warm water and dry thoroughly.

Unfortunately, cleaning doesn't always help.

If the orthophosphoric baths did not work, the sensor should be replaced or turned off by software.

Install lambda probe snag

A broken or malfunctioning oxygen sensor cannot be repaired, but it can be replaced with an expensive new one or a blende can be installed. Many car owners choose this simple way to trick the electronic control unit. In this case, the blende sends an average (similar to a working) signal to the ECU and the computer thinks that everything is fine. The whole point of the motor's adaptability is then lost. The computer does not understand how well the mixture is prepared and how environmentally friendly the exhaust is. Without a normal sensor, the ECU goes crazy, resulting in increased consumption fuel and other troubles.

Types of trickery for a lambda probe

Mechanical snag for a lambda probe. This universal spare part is installed on almost all vehicles. Inside it is a mini-catalyst through which the exhaust gases pass. There they are a little cleared and the electronic unit control receives underestimated values of harmful emissions.
Electronic snag for a lambda probe. It is specially programmed for a certain brand, volume and year of production of the car, which makes it more expensive than mechanical. Connect the device to the wires, through which the values are corrected to permissible.

In both cases, the signals from the first and second oxygen sensors will be different. The ECU will take this reading as normal work catalyst.

Pros and cons of installing a blende lambda probe

Deception of the lambda probe will extinguish " Check Engine". The cost, compared to other solutions, is small, so this is the most popular procedure.

Deception for a lambda probe, in contrast to replacing a sensor or chip tuning, does not take into account different parameters and engine operating conditions. For example, fuel injection adjustment. Therefore, with automatic correction, the readings after some time will go beyond the conditionally normal limits again, error P0140 will come out and the check will light up.

Disable lambda probe programmatically

After the physical removal of the catalyst, the software shutdown of the lambda probes that stand after it is a mandatory step. Without adaptation, the second sensor located after the catalyst transmits incorrect exhaust values, the check lights up and the engine goes into emergency mode. This is fraught with increased fuel consumption and poor dynamics.