Why does the injector check light on the VAZ 2107. Why is the injector light on?

Hello, dear car enthusiasts! Probably many of you, while driving your car, have been spoiled a lot by the Check Engine light that lights up, then goes out, or even burns (without any obvious reason) with an “eternal flame.”

What's wrong? Even many auto gurus cannot give an exact answer to the question why the injector light is on. Let's try to dig into the structural principle of the malfunction.

The electronic control unit (ECU) of your car controls the engine through a system of sensors. If the light comes on, this means that one or more sensor parameters have failed, to which the ECU reacts accordingly.

Let's consider the functions assigned to the injector sensors. Knowing what the sensors are responsible for, it is somewhat easier to judge the behavior of your car and draw conclusions: either fix the problem yourself, or contact a car service for it.

The injector light is on: what the sensors say

Crankshaft sensor - determines the speed of its rotation, position, and, consequently, the location of the pistons in the cylinder. The sensor operates based on electromagnetic induction.

If the injector is on because the crankshaft sensor is triggered, the consequences, if ignored, may be as follows: engine idling will be unstable, and if the sensor fails, the engine may stall and will not start at all.

The injector light is on for a reason, which is responsible for controlling the gas distribution control in each engine cylinder. In this case, the ECU switches from phase injection to backup - the so-called pair-parallel mode.

The operating principle of the sensor is based on the Hall effect; the sensor is located on the front of the block on the input manifold side. Typical signs of a malfunction are increased fuel consumption and hesitant engine starting.

If the injector icon is on due to the throttle sensor readings, then the characterizing factor of the malfunction is the specific ringing sound of engine detonation. The sound becomes most noticeable when the revs drop during acceleration. As a consequence of this: fuel consumption increases and power decreases, since the engine must constantly operate at low angles with ignition advance.

The injector indicator lights up due to the readings of the air sensor, which is responsible for assessing the air filling of the cylinders. Characteristic features of the malfunction, as a rule, are an increase in idle speed (1500-3000 rpm). Also, when you release the gas pedal, the speed decreases slowly or does not decrease at all without additional throttling. In addition, characteristic jerks are observed when accelerating the car.

If the injector light comes on due to the readings of the absolute pressure sensor, which reacts to its change in the intake tract, then the characterizing factor is the engine running on a too lean or rich combustible mixture. As a result, there will be an “incorrect” exhaust, misfire at idle, and problems will also arise when turning off the engine.

The injector indicator is on due to the temperature sensor readings, the purpose of which is to assess the thermal state of the engine. In this case, the ECU will select a backup mode, which involves turning on the cooling fan and driving the high idle speed. If the sensor fails, it becomes difficult to start the engine and increases fuel consumption.

Speed ​​sensor - designed to estimate the speed of movement. If it does not work correctly, the motor will operate unstable, and if the load is suddenly dropped, the motor will stall. Deteriorated dynamics are also observed, and the trip computer and electronic speedometer give false readings.

Oxygen sensor - estimates the amount of oxygen in the exhaust gases. Characteristic factors in case of its malfunction are the appearance of periodic oscillations during idle mode and increased fuel consumption.

In addition to all of the above, the reasons may be mechanical damage to the circuit (break, short circuit), break or leakage of the gas distribution mechanism, moisture, overheating, etc.

If the injector is on, then the answer to the question “why?” will most accurately be answered by an error code that will determine the cause in a matter of seconds. Naturally, for this we need a motor tester or a specialized computer diagnostic program.

For many car enthusiasts, while driving, their mood is spoiled by the constantly burning or flashing Check Engine injector light. And there seem to be no obvious reasons for this. Even experienced car service technicians will not be able to give an answer to this right away. Let's try to understand in more detail the very structure of the mentioned reason.

The principle of operation is as follows: the vehicle's electronic control unit (ECU) controls its engine through sensors in the Powertrain system. When the injector light comes on, this means that one or more sensors indicate a change in parameters in a critical direction. Now let's look at some of the functions that are assigned to sensors, which will help you determine the nature of the violations.

Causes of malfunction

Motorists are wondering: why does the VAZ 2107 engine suffer from injector problems? Many owners of injection VAZ 2107 encountered the fact that the engine began to stall. This malfunction is typical for the entire family of Lada engines. What are the reasons for this effect and where to look for the problem:

• Fuel pump and filter.
• Injectors.
• Spark plugs and high-voltage wires.
• Air filter.
• Throttle.
• valves.
• ECU and sensors.

Solution methods

When the reasons for the throttling of the injection-type VAZ 2107 engine have been determined, you can proceed directly to analyzing options for eliminating the problem. Before you begin, you need to understand that you need to know the design features of the motor.

But the 2107 engine is so simple that even the most inexperienced motorist will figure out what’s going on. So, let's look at how to remove the injector tripping of a VAZ 2107 engine.

Fuel pump and filter

The first place to look for the cause begins with the fuel supply. First, you should check the fuel pump for functionality and whether there are any malfunctions. If this element does not show visible signs of damage, then it is recommended to disassemble it and check it.

Many experienced car enthusiasts advise, after the fuel pump, to start replacing the fuel filter element, since this is where fuel can poorly pass to the injectors. The fuel filter, according to the service documentation, must be changed every 30-35 thousand kilometers.

Injectors

The next place to look for trouble is the injectors themselves. They may be clogged due to the use of low-quality fuel or defective due to their service life, in other words, worn out.

The elements are checked using a special stand, which not only diagnoses the condition, but also cleans the elements. If there is a damaged or worn part, it is better to replace it with a new element.

Spark plugs and high voltage wires

Loss of spark can also lead to engine malfunction. The next unit that needs to be examined is the ignition. First of all, it is recommended to diagnose the spark plugs. To do this, you need to pull them out from the block head and visually inspect them for cracks. Next, it is recommended to clean the spark plugs from accumulated dirt.

It is worth noting that it is necessary to pay attention to the condition of the spark plug contacts. If they are in oil or have heat, then the problem is not only the engine tripping.

The next stage of diagnosis is to ring the contacts using a multimeter and measure the gap. In most cases, such diagnostics show that the spark plugs are not suitable for further use and should be replaced.

Another element of the ignition system that directly affects the ignition of the air-fuel mixture is high-voltage wires. How well and economically the motor will work will depend on their condition. Therefore, it is recommended to inspect them for damage and also test them with a multimeter.

Air filter

A dirty air filter can lead to the engine not receiving enough air into the combustion chamber, and accordingly the formation of the air-fuel mixture will be disrupted. Therefore, it is recommended to inspect the element, and if it is found that it is dirty, it must be replaced.

Throttle

A dirty throttle valve also prevents the normal flow of air into the engine. To diagnose the unit, it is necessary to dismantle it. If you find that dust and other foreign objects have accumulated on the walls, you should clean the part. To do this, you will need a special product or liquid for cleaning carburetors. This operation can be performed by any car enthusiast without any problems.

valves

Burnt-out valves can cause the engine to start to misfire, since a gap is formed between the seat and the exhaust valve, through which exhaust gases flow back into the combustion chamber, thereby disturbing the balance in the air-fuel mixture.

Conclusion

The reasons for the tripping of the VAZ 2107 injection engine have been identified and the main methods for eliminating the malfunction have been established. But, if a motorist is not sure that he is able to repair his car on his own, then it is better not to risk it and turn to professionals.

Good afternoon, RusAuto fans. The next question is, maybe someone has come across this before.

Last night I came home, put the car in park, everything worked great, even the XX didn’t jump, I turned it off and went to bed, I didn’t warm up the car at night, it usually started like that. In general, I insert the key, turn it, silence, although all the sensors are on, the battery is charged. The manipulation is repeated several times, on the 6th or 7th time the car catches and starts very reluctantly, but it does start. After I started, I felt that the car was shaking, the check light came on. Previously, my check light came on, but it didn’t bother me much, because after a certain period of time it went out on its own and that was it. Today the check light first came on - the car was working, shaking, then the check flashed, blinked 9 times and turned the car off. I waited a minute, tried again to get the car in, it started right away, the check light didn’t light up at first, then it came on again, it was on continuously for about 10 seconds, then it blinked again, blinked 9 times and turned off the car again. I performed such dances for 10 minutes, I didn’t count how many times I did it, after this time I spat. I went to the bus stop.

Anyone who has had this happen, please tell me what could be the reason and what is the likelihood that it will heal on its own? Will resetting the terminals from the battery help, maybe there are some other radical methods? Well, ideally, maybe someone could drive up with a device and do a diagnostic?

A car is a complex of complex components and mechanisms. No matter how much automakers improve production technology and increase reliability, no one is immune from sudden breakdowns. This applies to all car enthusiasts. Both the owner of an expensive foreign car and a used VAZ can encounter such a malfunction as engine tripping. Well, let’s look at why the “check” blinks on a car and the engine stalls.

What is engine tripping?

First, let's look at the definition of this concept. This term appeared due to the 4-cylinder engine design, where if one of the cylinders failed, only three working pistons remained. However, tripling does not only apply to internal combustion engines with four cylinders. Now this concept is applied to all internal combustion engines - six-cylinder and even twelve-cylinder.

Replace the oxygen sensor (lambda probe)

The oxygen sensor in your car is part of the exhaust system that monitors how much oxygen is not burned in the engine combustion chamber. This sensor helps control the vehicle's fuel consumption. A malfunction of the oxygen sensor (lambda probe) means that the car computer does not receive the correct data and can significantly increase fuel consumption, and at the same time reduce engine power. Most cars have 2 to 4 oxygen sensors. If you have a home car error scanner, then by connecting it to the car you can easily find out which sensor needs to be replaced.

For what reason does the oxygen sensor in a car become unusable: - Over time, the sensor becomes covered with a layer of used and regular motor oil (oil soot), which reduces the accuracy of reading sensor readings for regulating the gasoline mixture and distributing optimal fuel consumption. A malfunction of the oxygen sensor in a car leads not only to increased fuel consumption, but also to an increased content of harmful CO2 substances in the exhaust.

What needs to be done: -If you do not change a faulty car oxygen sensor, this may lead to failure of the car catalyst (it may burst), which will result in expensive repairs for you. The cost of new catalysts is very high due to the precious alloys they contain. Some cars have several of these catalysts at once and their cost can reach up to 90 thousand rubles. So gentlemen, don’t delay replacing the oxygen sensor. Although replacing the sensor itself and its cost are decent, it is still not commensurate with the cost of the exhaust gas catalyst system itself. You can save money on replacing this sensor by doing it yourself. Many car manuals have detailed instructions on how to replace the oxygen sensor yourself. If you know where the oxygen sensor is located, then it will not be difficult for you to disconnect the faulty lambda probe and replace it with a new one. Remember that you cannot delay replacing this important element!

Signs

How do you know if the engine is leaking? With such a malfunction, the check engine light does not always flash. Therefore, it is important to know third-party signs that may indicate a problem:

• Increased engine vibration. It is significantly noticeable at low and idle speeds.
• Spark plug color change. After removal, its head will be dark. Since the mixture does not ignite, the candle becomes covered with soot and soot.
• Increased fuel consumption. This sign is related to the previous one. Since the mixture does not ignite, it simply goes into the exhaust pipe.
• Loss of engine power. Since the engine runs on three cylinders, it does not have enough energy to produce the required torque.
• Exhaust sound. He will be unstable.
• The appearance of black or thick white smoke from the exhaust pipe.
• Intermittent jolts during acceleration and even motion. This symptom also indicates a misfire. This error is often related to the ignition system.

Mass Air Flow Sensor

The air sensor is responsible for filling the cylinders with air, thereby ensuring the optimal air/fuel mixture. Symptoms of a Check Engine fire, according to it, are an imbalance of air in the cylinders. As a rule, the idle speed increases (1500-3000 rpm), and when the pedal is released, the speed decreases slowly or does not decrease at all without additional throttling. As a result, there is a decrease in power due to oversaturation or, conversely, poor air saturation, characteristic “jerking” during acceleration.

Reasons for tripling

If the “check” is flashing on a VAZ car and the engine is shaking, this may indicate the following problems:

• Presence of air leaks in the brake system (possible problems with the vacuum booster).
• Failures in adjusting the ignition timing.
• Faulty spark plugs.
• Violation of the integrity of the high-voltage wire.
• Ignition coil malfunction.
• The air filter is clogged (the engine simply does not have enough oxygen).
• Violation of carburetor adjustments (applies to older cars).
• Failures in adjusting the gas distribution mechanism.

Among the more serious problems that cause the “check” to flash and the engine to stall, we can highlight:

• Worn intake or exhaust valve. This could be a burnout or mechanical deformation of the plate.
• Intake manifold leakage.
• Wear of valve stem seals (in this case, the engine consumes about one liter of oil per thousand kilometers).

Knock Sensor

If a car has a knock sensor, it is responsible for dampening strong engine vibration through dosed fuel supply, thereby ensuring fuel savings (about 9%).

In addition to the above, the reasons may be: open or short circuit, mechanical damage to the wiring, slippage or breakage of the gas distribution mechanism, external overheating, increased induction fields, moisture, etc.

If you are not confident in your abilities, do not under any circumstances start troubleshooting, seek the help of professionals, especially since today ECU diagnostics are inexpensive, and based on the readable error code, it allows you to accurately identify the faulty engine unit.

No amount of savings on repairs will help you if you face the risk of serious problems.

VAZs, like the vast majority of modern cars, have a lot of different sensors that monitor engine performance. Like other engines, the power unit of the latest VAZ models has an ECU (electronic control unit), which, if faults or disturbances in the operation of the internal combustion engine are detected, can issue an inscription that many motorists are very afraid of. As you understand, we are talking about Check Engine

, this is an error that means “check engine”, literally.

There is no need to despair over this error, as it can often indicate minor problems, such as bad fuel or the need to replace spark plugs. But unfortunately, there are situations when Check Engine can mean the “death” of the engine, so this error cannot be taken lightly, and at the first opportunity it is necessary to check all components that may be involved in the appearance of this error.

Check Engine sensors

" appeared in the 80s, they were invented to monitor the operation of the carburetor, so if the Check Engine light came on, it could only mean one thing - the carburetor was faulty. Over time, this “light bulb” was followed by other malfunctions that were already associated with malfunctions of the engine, as well as its various systems. Consequently, with the advent of new “responsibilities”, interpreting the appearance of the Check Engine has become quite difficult. The Check indicator lights up after the ECU detects problems with the engine. Various sensors report this to him, based on this the first conclusion can be drawn - the Check Engine can light up even if the sensors themselves malfunction.

It is normal for a Check Engine

after you turn the key in the ignition, after you start the engine, the inscription should disappear, if this does not happen, read about the reasons why this error may appear. When you start the engine, the ECU checks all systems and if there are no problems, the Check light goes out, but if the computer finds a breakdown, the light will not go out until you fix the problem or make an error.

Determining the faulty cylinder

Which cylinder causes the “check” to blink and the engine to stall? Diagnostics will show the result. You can perform this operation yourself:

• Disconnect the armor wire tips from each spark plug one by one. It is advisable to do this with rubber gloves to prevent electric shock.
• Record how much the nature of the engine’s operation has changed. If the engine runs even harder, the cylinder is good. If, after removing the wire, the engine operates as before, then this cylinder is faulty.

Please note that when disconnecting the wire, you do not need to grasp the cap. You should grab the wire, but carefully. Do not pull it by force, otherwise the wire may be damaged.

Another way to check is computer diagnostics. In this case, we connect the diagnostic equipment to the ODB II connector and turn on the ignition. Then the computer will read all errors. If this is a Toyota car, then misfire in the third cylinder will be indicated by error p0303.

What to do if the engine check light comes on

Firstly, you should remember that this light does not always indicate problems with the engine.

1. If the “Check” lights up when starting the power unit and immediately goes out, this means that the engine is in good working order, and this is not a cause for concern.
2. If the indicator does not go out, start to worry, since a breakdown has been detected in the engine. But you shouldn’t be too upset, since there is a possibility that they are insignificant, although critical ones are not excluded.

How to check spark plugs?

For this we need a special spark plug wrench. All work is performed on a cooled engine. On many cars, access to spark plugs is unlimited. But on some models (for example, Nissan Qashqai), for this you first need to remove not only the decorative cover, but also the plastic intake manifold, as well as the throttle valve. When dismantling these units, you should stock up on new gaskets.

Having taken out the candle, it is worth inspecting its condition. It should not have any plaque. You also need to check the gap with a special feeler gauge. It is different for each car, but often amounts to 0.8 millimeters.

If the gap is too large, a spark simply cannot form, which is why the “check” blinks and the engine stalls. If there is a large gap on the spark plug, this can be easily fixed. To do this, just bend the electrode slightly, and then check the distance with the same probe. If the candle has carbon deposits, it can be cleaned. You can also replace it with a new one. In this case, we will know exactly what the problem is - in the candles or in something else.

High voltage wires

What should you do if, after replacing the spark plug, the “check” flashes and the engine starts again? In such a situation, it can be assumed that the reason lies in the high-voltage wire. It can be checked in two ways:

• Visually. We take out our wire and look at its integrity. The high-voltage element must not contain cracks, cuts or abrasions. Any of these symptoms can provoke a breakdown of the wire, due to which the coil will not be able to transmit a spark even to a known-good spark plug. You can also check the wire in another way. In the dark you need to watch its work. If “crickets” are visible, this indicates that there is a severe breakdown of the insulation.
• Using a multimeter. This is a more accurate way of diagnosis. To measure the resistance of a high-voltage wire, the multimeter is switched to ohmmeter mode. Then, using probes, you need to touch both sides of the wire. Next, the device will display information. The resistance of high-voltage wires should be no more than 10 kOhm. If the indicator is higher than normal, this indicates the presence of a breakdown.

Malfunctions of the VAZ-2107-20 injection engine

Page 1 of 4

Possible malfunctions of an engine with fuel injection and methods of elimination are considered in the table:

Error code: Why Lada Vesta/XRAY does not start, causes of malfunctions » Lada.Online - all the most interesting and useful about LADA cars

“Peter – AT” INN 780703320484 OGRNIP 313784720500453

Problems with fuel and other systems

The “check” can also light up due to a malfunction of the fuel system. The engine will also stall. A common situation is an insufficient amount of fuel supplied to the cylinder. This may indicate contamination of the injectors. But tripling also occurs for other reasons. This:

• Dirty fuel filter.
• Problems with the fuel pump.
• Faulty air flow sensor.
• Worn throttle valve.

It is recommended to check the compression level. If at the same time the cylinder has low compression (it differs from neighboring cylinders by 2 or more units), this may indicate serious mechanical malfunctions, such as:

• Piston burnout.
• Wear of piston rings.

In this situation, it will no longer be possible to fix the breakdown yourself. Requires engine disassembly and complex repairs.

If the car is equipped with HBO

Very often, cars with gas equipment have a similar problem. Why does the engine stall and the check engine light flash? There are several reasons for this:

• Clogged gas filter. No matter what generation the gas equipment is, it must have a gas filter. This is a small element that is usually installed next to the evaporator reducer. On average, the filter resource is 20-30 thousand kilometers. But if you refuel with low-quality fuel, this deadline may come earlier. As a rule, the filter becomes clogged with graphite shavings, which prevent the gas from passing further through the membranes of the reducer. You can replace the cleaning element yourself. To do this, you must first turn off the valve on the tank, start the engine and exhaust the remaining gas from the line. Then unscrew the cap with a hexagon and replace the filter. It is also worth installing a new gasket. Upon completion of work, do not forget to unscrew the gas supply valve on the fuel tank again. At first, the engine will be difficult to start, but then its operation will stabilize (since the fuel needs time to get into the gearbox).
• Malfunction of gas injectors. The problem is relevant for fourth generation HBO. At the same time, gas consumption increases, detonation and tripling appear. How to fix this problem? As a rule, the problem is resolved by flushing and calibrating the injectors. However, unlike the previous case, it will be difficult to do this work yourself. Here it is better to seek help from specialists.

Other problems may be related to the ignition system, but these malfunctions are no different from simple gasoline cars without LPG. If the engine troubles due to wires or spark plugs, you need to act in the same way as described above.

Why does the check light on the VAZ light up?

So, you have purchased a good, unpretentious car - a VAZ. But at one fine moment, the “Check Engine” icon lit up on the dashboard of your car, the literal translation is “check the engine”, in the slang of auto mechanics - “throw out the engine”, “meat grinder”, “check”, etc. (applies only to injection cars - Priors, Kalinas, etc.) The “check engine” icon itself, which does not go out after starting the engine, indicates a malfunction or electrical malfunction in the electronic engine control system (ECM). Many irresponsible citizens believe that in a domestic car the “check” should always be on, but this is not true; in a working car, no yellow or red indicators on the instrument panel should be on.

What malfunctions of the engine control system light the check?

A malfunction of the air flow meter MAF (mass air flow sensor) can light up the check lamp, errors P0102 or P0102, and a faulty flow meter also leads to such troubles as uneven engine operation, lack of acceleration dynamics, and high fuel consumption. As the name suggests, this sensor measures the amount of air entering the engine intake manifold and, based on this data, the control unit calculates the required amount of fuel. In general, this is the most important sensor in the engine control system; a lot depends on its readings. The air flow meter can either completely fail or distort the readings, which will lead to improper engine operation. A malfunction of the mass air flow sensor cannot always be easily diagnosed; the easiest way to diagnose it is to replace it with a known good one, taken from a neighbor. Connection diagram for VAZ mass air flow sensor.

A faulty intake air temperature sensor (built into the mass air flow sensor) causes errors P0112 or P0113. The air temperature sensor readings are used by the control unit to adjust the fuel mixture depending on the outside air temperature. The temperature sensor cannot be replaced separately from the air flow meter.

Malfunction of oxygen sensors, both front (before the catalyst) and rear (after the catalyst). Malfunctions of oxygen sensors can be different, such as an open heating circuit (easily diagnosed with a multimeter), or such malfunctions as a slow response of the sensor due to aging or poisoning with low-quality fuel, which often do not cause the check to ignite, greatly affecting fuel consumption, vehicle dynamics, difficult to diagnose.

A malfunction of the catalyst “low catalyst efficiency” lights up the “check” lamp and has a slight, practically no effect on the behavior of the car. What is a catalyst and why is it needed?

A malfunction of the coolant temperature sensor causes the check ignition and errors P0117 or P0118, depending on whether it is a break or short circuit in the sensor or its wiring. It can be easily diagnosed with a multimeter; the repair manual gives the reference resistances of the sensor at different temperatures.

A malfunction of the throttle position sensor will lead to errors P0122, P0123 and emergency operation of the engine; the serviceability of the throttle position sensor is checked with a multimeter.

Lean mixture - error P0171 has many possible causes, first of all, low fuel pressure and further possible causes are clogged fuel injectors, air leaks, a malfunction of the air flow meter, a malfunction of the ignition system. We consistently diagnose all these reasons. For example, in this case the fuel pump turned out to be faulty.

Rich mixture - error P0172 may be due to a malfunction of the fuel pressure regulator (high pressure in the fuel system) we check by measuring the fuel pressure, leaking fuel injectors, faulty air flow meter, faulty oxygen sensor, stuck canister purge valve, problems with engine mechanics.

Broken fuel injector - errors P0201, P0202, P0203, P0204, the last digit is the number of the cylinder with the malfunction, the faulty cylinder does not work.

Fuel pump circuit malfunction - error P0230, this error indicates a break not in the fuel pump, but in the primary circuit of the fuel pump relay, most often the cause is an alarm lock or anti-theft lock.

Misfires - errors P0300, p0301, P0302, P0303, P0304. It is more correct to say misfires; using the crankshaft position sensor, the engine control unit measures the angular acceleration of each cylinder; if acceleration does not occur in this cylinder, “the counter is triggered,” when the counter overflows, the check light comes on or starts flashing with the corresponding errors. The most common cause is a malfunction of the ignition system - here the ignition coil turned out to be faulty.

Checking the ignition coil

A faulty knock sensor lights up the check with errors P0326, P0327, P0328. If the knock sensor malfunctions, the control unit goes into emergency operation mode and sets a safe (late) ignition timing angle. Affects dynamics and fuel consumption.

Crankshaft position sensor malfunction - error P0335. We check the crankshaft position sensor with an oscilloscope. In this case, the sensor stopped working after the engine warmed up.

Malfunction of the camshaft position sensor - error P0340, checked in the same way as the crankshaft position sensor.

P0500 - a malfunction of the vehicle speed sensor leads to decreased dynamics and increased fuel consumption.

Malfunction of the canister purge valve - error P0443, does not affect engine operation unless it is stuck open. The car's fuel tank is sealed, fuel vapors are collected in the canister and, when the engine is running, through the canister valve they enter the engine intake manifold, where they burn together with the working mixture.

Well, electrical wiring faults happen in these beautiful, moderately reliable cars; they manifest themselves in different ways, such as blown fuses due to a wire from the oxygen sensor stuck to the exhaust pipe, or torn wires from the crankshaft sensor, etc.

Oxygen sensor

Now all cars are equipped with catalysts. For proper operation of the catalyst, a lambda probe is required. This is a special sensor that reads the remaining oxygen, based on the data of which the mixture and ignition are adjusted.

If the lambda probe is faulty, the car may consume more fuel than it should. Also, at the same time, a “check” lights up on the panel. However, the engine may not be tripping. How to solve this problem? Since the new catalyst is very expensive, many simply knock out its “filling” and install a fake instead of an oxygen sensor. This way the ECU will consider that the system is working correctly, and the “check” will no longer light up on the panel.

Let's sum it up

So, we looked at why the “check” on a car blinks and at the same time the engine stalls. The most common causes of breakdowns are a faulty spark plug or a breakdown of the high-voltage wire winding. You can check this yourself, even without diagnostic equipment (although, to save time, it is better to use it and just read the error codes). Anyone can replace a spark plug or wire. You don't need any special tools for this. However, if the “check” is on due to burnout of the valves or wear of the rings, as indicated by a compression test, only a professional mechanic can help in this situation.

Is it possible to drive when the Check Engine light is on?

If you see that the Check Light has come on, the first thing you need to do is stop and listen, take a closer look at the operation of the engine. If everything is normal, the speed does not fluctuate, there are no noises, the fluid level (fuel, oil, coolant) is normal, you can continue driving, but upon arrival, be sure to visit a service station to determine the cause of the Check Engine. If the problem is resolved, then the Receipt sign should disappear soon, this can happen in an hour or in a day or two. If this does not happen, then the problem is not solved and the search for the fault must be resumed.

If you are unable to independently find the reason why this error occurs, contact a service station, where specialists, using special equipment, can easily determine the cause of the error and help eliminate it.

Hello, dear car enthusiasts! Probably many of you, while driving your car, have been spoiled a lot by the Check Engine light that lights up, then goes out, or even burns (without any obvious reason) with an “eternal flame.”

What's wrong? Even many auto gurus cannot give an exact answer to the question why the injector light is on. Let's try to dig into the structural principle of the malfunction.

The electronic control unit (ECU) of your car controls the engine through a system of sensors. If the light comes on, this means that one or more sensor parameters have failed, to which the ECU reacts accordingly.

Let's consider the functions assigned to the injector sensors. Knowing what the sensors are responsible for, it is somewhat easier to judge the behavior of your car and draw conclusions: either fix the problem yourself, or contact a car service for it.

The injector light is on: what the sensors say

Crankshaft sensor - determines the speed of its rotation, position, and, consequently, the location of the pistons in the cylinder. The sensor operates based on electromagnetic induction.

If the injector is on because the crankshaft sensor is triggered, the consequences, if ignored, may be as follows: engine idling will be unstable, and if the sensor fails, the engine may stall and will not start at all.

The injector light is on for a reason, which is responsible for controlling the gas distribution control in each engine cylinder. In this case, the ECU switches from phase injection to backup - the so-called pair-parallel mode.

The operating principle of the sensor is based on the Hall effect; the sensor is located on the front of the block on the input manifold side. Typical signs of a malfunction are increased fuel consumption and hesitant engine starting.