Low fuel lamp is burning: How else can you drive? How many gasoline remains if the light lights up? Why is the VAZ fuel bulb constantly burns.

24.11.2020

To inform the driver about the amount of fuel in the car's tank, the fuel level indicator is installed on the dashboard. By itself, it is not particularly noticeable and to eliminate the likelihood of a complete flow of gasoline or diesel fuel, on the dashboard, there is additionally a warning lamp that is indicated by a schematic image of the benzocolone.

When sunbathing, the light informs that gasoline in the tank is critical and enough for overcoming a short distance. The fuel level light lamp is made so that the driver noticed in advance that fuel in the tank has little and drove to refuel.

The signal light can be considered a useful addition of the fuel sensor. The fact is that the sensor readings are not always accurate, there are certain errors (due to the configuration of the tank, the position of the car and a number of other factors). Therefore, the sensor can show an "empty" tank when filing on ¼ or 1/5, depending on the volume of the tank (and this is 10-15 liters). It can confuse the driver, since the sensor arrow shows "0" both at 10 liters and 1 liter of gasoline in the tank.

Types of indicator, principles of work

On the car with carburetor systems, the power lamp power was carried out from the potentiometric fuel level sensor, that is, the sensor and the lamp are connected. The principle of operation is very simple - when a certain level of gasoline is reached, the potentiometer runner associated with the float closes the contacts of the lamp. At first, the contacts are closed intermittently (affects the splashing of gasoline in the tank), so the indicator flashes, but with greater fuel consumption, the contacts of the lamps become closed constantly.

In modern cars with an injector power system, the sensor and the indicator are separated. The warning lamp is powered by its sensor installed on the pump housing. The main element of the signal lamp sensor is the thermistor placed in the metal flask. The principle of operation of the chain "Lamp-sensor" is built on a change in the resistance of the thermistor from the effect of temperature.

It all functions like this: the thermistor is supplied to the thermistor, which is why it is heated. The fuel acts for it with coolant, it takes the heat, maintaining the temperature of the sensor. If the gasoline level drops below this sensor, then the temperature of the thermistor to increase, which leads to a change in its resistance. As a consequence, the resistance change lights the lamp.

The indicator built on the basis of the thermistor is good because it is not associated with the fuel level sensor and works independently of it. This makes it possible to notice a decrease in the level of fuel even with a non-working fuel sensor.

How much can you drive with a burning light bulb

Now, how much gasoline remains in the tank, if the lamp caught fire and how much it is enough on different models, this indicator is different. On average, automakers set the reserve per 100 km stroke. That is, the light bulb lights up if there are from 5 to 10 liters in the tank, depending on the model. But this does not mean that after sunbathing a warning lamp, the driver will drive 100 km. The distance that can be driving on the reserve of gasoline, affects the driving style, features of road conditions, load on the engine, etc. That is, one driver will pass on the reserve 80-90 km, and the second is enough for only 30-40 km. Therefore, it is not necessary to hope that you will drive on the remains of fuel in the tank a large distance. With a tanned indicator, immediately should be sent towards a gas station.

How to go if the gasoline light caught fire

It happens that the light bulb on the dashboard caught fire, and the gas station still needs to be driving a significant distance. And in this case, measures should be taken so that the reserve is enough before refueling.

For this you need:

Choose a way with a minimum number of stops. Take into account that 5 liters of gasoline to make the car and get to the refueling is not enough. It is necessary to at least 10 liters so that the pump can fully pump the power system and ensure a stable fuel supply. If the gasoline is less, then the fuel pump due to lack of gasoline will "drive" the air, which is why the engine will not be able to work stably.
Choose a high-speed mode at which gasoline consumption is minimal (70-80 km / h).
Reduce the load on the on-board network, leaving only the necessary electrical equipment included.
Close the windows, bend on the track behind the truck, it will reduce air resistance to a minimum.

These measures will allow to drive a greater distance on the fuel residue.

What threatens a small amount of gasoline

Note that it is better to prevent a decrease in the amount of gasoline to the level when the warning lamp is triggered. If there are no negative consequences for carburetor cars, it does not bear any negative consequences, except for the likelihood of unexpected cessation of movement and "walking" with Kanishysto to gas stations, then in injection cars this phenomenon is dangerous.

The problem is that the fuel pump in such machines is placed in the tank and fuel for it - the coolant. If gasoline is not enough, then due to overheating, the pump electric motor can fail. "Crying" air pump is also nothing good.

Another problem is that with a low level of fuel pump shakes fuel "from the bottom" of the tank, where the litter and dirt accumulates. This leads to clogging of the filter of the fuel receiver, because of which the pump operates under an increased load, which increases the probability of breakage.

Types of indicator, principles of work

On the car with carburetor systems, the power lamp power was carried out from the potentiometric, that is, the sensor and the lamp are connected. The principle of operation is very simple - when a certain level of gasoline is reached, the potentiometer runner associated with the float closes the contacts of the lamp. At first, the contacts are closed intermittently (affects the splashing of gasoline in the tank), so the indicator flashes, but with greater fuel consumption, the contacts of the lamps become closed constantly.

How much can you drive with a burning light bulb

Now, how much gasoline remains in the tank, if the lamp caught fire and how much it is enough on different models, this indicator is different. On average, automakers set the reserve per 100 km stroke. That is, the light lights up if the gasoline in the tank remained from 5 to 10 liters, depending on the model. But this does not mean that after sunbathing a warning lamp, the driver will drive 100 km. The distance that can be driving on the reserve of gasoline, affects the driving style, features of road conditions, load on the engine, etc. That is, one driver will pass on the reserve 80-90 km, and the second is enough for only 30-40 km. Therefore, it is not necessary to hope that you will drive on the remains of fuel in the tank a long distance. With a tanned indicator, immediately should be sent towards a gas station.

How to go if the gasoline light caught fire

It happens that the gasoline light on the dashboard caught fire, and the gas station still needs to drive a significant distance. And in this case, measures should be taken so that the reserve is enough before refueling. For this you need:

Choose a way with a minimum number of stops. Take into account that 5 liters of gasoline to make the car and get to the refueling is not enough. It is necessary to at least 10 liters so that the pump can fully pump the power system and ensure a stable fuel supply. If the gasoline is less, then the fuel pump due to lack of gasoline will "drive" the air, which is why the engine will not be able to work stably.
Choose a high-speed mode at which gasoline consumption is minimal (70-80 km / h).
Reduce the load on the on-board network, leaving only the necessary electrical equipment included.
Close the windows, bend on the track behind the truck, it will reduce air resistance to a minimum.

These measures will allow to drive a greater distance on the fuel residue.

What threatens a small amount of gasoline

Note that it is better to prevent a decrease in the amount of fuel to the level when the warning lamp is triggered. If there are no negative consequences for carburetor cars, it does not bear any negative consequences, except for the likelihood of unexpected cessation of movement and "walking" with Kanishysto to gas stations, then in injection cars this phenomenon is dangerous.

Video: light bulb caught fire, how much fuel is enough?

In the automotive environment, a clear conviction was rooted - ride with a small amount of fuel in the tank, when the lamp of the minimum residue was already caught fire, harmful to the car. This is what the driver's Solve says, the instructions for the operation of cars speak about it. At the same time, there are no direct dependencies, they say, once drove with a burning lamp and everything broke, and it seriously complicates the conversation on this topic - it is not known that it does not know what it affects and what it leads to. There are only observations and theoretical experience. But we still tried to disassemble the situation and understand how really it is harmful to ride on the burning light of fuel. Consider the most popular arguments and confirmations that support the supporters of this point of view.

Overheating Benzonasos

In modern injection vehicles, submersible pumps are used, they are lowered into the tank and "live" among gasoline. It does not simply lie there, but is located in a special fuel module, which, among other things, includes a plastic anti-graded glass, fuel level and much more. The fuel pump itself is located inside the entire structure, during operation it highlights heat, and therefore should be cooled. There are no additional systems that take heat, there is no gas station (in general, it is a pretty simple design), so cooling is produced by gasoline - as what passes through the pump itself and the fact that it floats in the tank around. If there is little fuel in the tank, the heat dissipation is worsen, the pump overheatsmay be deformed and swam. Due to the increasing temperature, windings can collapse, electrical connectors can be melted, in general, a pleasant little.

This is the most popular point of view of harm driving "on the light bulb", and it is quite logical. True, for some reason, it is not taken into account that even when fuel pumps in the tank, the fuel pump does not work on the "dry", he still pumps gasoline through himself. As soon as gasoline ends, the motor stalls, the pump ceases to work - it turns out a peculiar protection from the fool. Is there a cooling of passing gasoline? Purely theoretically - yes, because the fuel pump is not a very powerful unit and there is not very much heat when working. We managed to find a couple of experiments on the Internet, which confirm such a point of view. But they, of course, were carried out in sterile conditions, no one froze the temperature in the tank.

Dirt and water at the bottom of the gas tank

For whatever refills, we are not refilled, with an increase in the mileage at the bottom of the gas tank, particles of various impurities and water are accumulated, which is formed in the gas tank in the form of condensate. This fact is indisputable (in a good way, the tank periodically needs to be cleaned), but there is an opinion that when gasoline is small in the tank, the concentration of "harmful substances" increases and the likelihood of filter clogging increases. The scored filter misses the fuel well, the pump runs unstable and breaksAnd water can go further along the fuel system and lead to breakdowns, and even.

Dirt in the gas tank. Photo - Drive.

On the one hand, it sounds logical, but on the other hand, the design of the fuel fence is so arranged that it always takes gasoline at the very bottom of the tank, and once "harmful substances" is heavier than fuel, they will still accumulate from the bottom, no matter how much gasoline in the tank is not It was. The scored fuel module filters is definitely the problem, but it is not very clear how it is connected with the empty tank and the ride on the "light bulb". In addition, deposits appear over time and mileage, but no one says that the burning lamp is harmful only for used cars, on new, too, do not recommend riding the last.

Air entering

Another theory says that with a small fuel level gasonasos periodically "grabs" airAnd this harms his work, he is poorly lubricated and tert "dry" and breaks.

It is also logical and not everything is clear. The presence of an anti-grade glass allows you to smooth out the fuel fluctuations in the tank during turns, accelerations and braking, to begin to grab the air of the fuel pump can already only when the fuel is completely completely over, but for a long time the pump does not work, if there is no fuel - the motor will not be fuel Harm should not.

Here is the main three reasons that are given as a substantiation of harm to a low-fuel ride. In each of them there are sound grains, but none of them allows you to fully theoretically substantiate problems that may arise from an empty tank. Meanwhile the opinion of drivers and manufacturers recommendations still do not arise in the same place. - already accumulated very large empirical experience in order to notice the connection between the low fuel level and the failure of the gas station.

Not one-time cases, but statistics says that those who constantly drive with an empty tank are more susceptible to breakage of the pump. Especially strongly it is noticeable on machines with, their owners are usually not refueling a lot, they need gasoline only to start - the fuel pump on such cars according to statistics lives less. It is unlikely to ignore such statistics.

At the same time, everything, of course, individually - the machines are operated in different conditions, the fuel pumps have a different design, the quality of fuel is also different, so it is impossible to accurately say that for all machines of the consequences of driving negatively to the same extent and lead to the same consequences - someone will break After the first "light bulb", and someone all his life goes without any problems, pouring 5-10 liters into the tank, simply because the fuel pump is very hardy or so the cards lay down.

Of course, one thing is a small level of fuel in the tank life will not be completely extended, but if you still refuel, then why just do it more often. You will not lose anything (because the fuel is still paying), but in the case of which we will extend the life of the fuel pump. Do not such reasoning, not enough to get rid of the habit of riding "on the light bulb"?

Car malfunction is unpleasant. The breakdown will be unexpected if they do not follow and not listen to warnings. One of them is the check engine "Check Engine". How to understand what the problem is what it indicates and what to do if she caught fire.

Purpose button

The instrument panel in the car is a way to control the level of gasoline, oil, engine performance, or other components of the car, which guarantee a comfortable and silent movement along the road.

Modern cars are equipped with necessary for the convenience and comfort of the driver indicator. If the engine fault earlier had to be found only visually or by careful listening to work, today a special light is working. It is created for the convenience of monitoring the status of the engine. Ideally, it should light up only when the engine starts and shine in a couple of seconds.

If the light bulb does not like or caught fire when driving, then it is worth thinking about faults in the main component of the car.

How serious may be the causes

Each signal on the car panel is an indication that the driver must be attentive. When the engine check indicator lights up, the reasons are somewhat.

Common cause - gasoline. Due to additives that unscrupulous manufacturers are used in gasoline, the engine works incorrectly, clogged. You should change the fuel or refund on another refueling, and everything works correctly.
Faulty candles.
Ignition coil breakage.
Acquired oxygen sensor (lambda probe).
Broken exhaust gas catalyst.
Incorrect operation of high-voltage conductors.
Disruption of nozzles.
Fuel pump or fuel filter.

Start checking stands from the cap of the fuel tank. If it is not tightened to the end or defects appeared on it, then the light indicates the wrong engine operation.

Each of the reasons is not very scary, but requires the elimination immediately. If you do not pay attention in time and do not diagnose the malfunction, you can lead to the complete breakdown of the engine and the incapacity of the machine.

The engine is serious, but it is not necessary that work requires overhaul or replace the engine. The work of the masters is important in any issue on the diagnosis and repair of the engine. But, if, the reason is the candles, then the replacement is performed independently and quickly, without the involvement of masters.

What to do if the light burns

If you have seen that the engine check light is not as if it should (not shock after starting the engine or lit when driving), then it is worth stopping for the machine's diagnostics. You can do this and not immediately, but necessarily. Remember, if it lights up, this is the reason or go to the service station for diagnostics, or check the engine for faults.

The first thing that can be done when lighting the light bulb is to stop and listening to how the engine works: it does not trite whether there are no outsiders or knocks. If you hear outsiders, they indicate the cause of the damage to the experienced driver. If the reason for the breakage is incomprehensible to you, the straight road is in the nearest service station.

If the reason for the lighting of the bulb will be low-quality fuel (this can be determined after the diagnosis, after the elimination of the remaining causes), then the service wizard will tell you that it is worth changing the type of fuel poured into the car or where you are accustomed to refuel.

Also conduct a visual inspection of the engine for cracks, irregularities, leaks. If you detect damage yourself, then the reason is also carried out.

Oxygen sensor. It is worth replacing yourself, following the instructions for the operation of a car of a particular brand. If it does not make a replacement on time, then the fuel is proceeded and the catalyst may break, the replacement of which will be much more expensive.
The leakage of the fuel tank is the cause of air getting intoward, which means the overrun. It is worth or replacing the cover or achieve tightness by gaskets.
Candles. This is the main element that guarantees the sunbathing of the fuel mixture. If it works wrong, then the car will refuse to work at all. Replace the candles do not make much difficulty if you are already an experienced driver. You can change either only that candle that has already worked out, or everything is immediately for sure to avoid troubleshooting in the car. The store is worth buying a set of candles for your car. If there is no confidence that buying the right option and you can change, then go to the service station, there and the parts you need already have and will be able to replace quickly and accessible. In the question of candles, it is necessary to remember that the machines of the old sample require a replacement every 20,000 km, and if the car is new, then on some and those candles it can drive up to 150,000 km. If you change the candles on time according to the requirements of the technical operation of your car, then you can avoid breaking the catalyst and improve the engine operation.
Replacing the mass flow sensor. This part adjusts the amount of air that is necessary for rapid ignition. When it is faulty, this is a fuel consumption, an increased amount of carbon dioxide in the exhaust, weak acceleration, reduced engine power. Most often, the breakdown is associated with an incorrectly installed air filter or the filter time has already expired. When it comes to changing the sensor, the costs are associated with the price of the sensor itself, but the replacement service in the service is not so expensive because it does not require high time and easy technology. Regular filter replacement - warranty of the durable operation of the sensor.

Nuances in the work of the light bulb "Check Engine"

The engine check light on the instrument panel appeared in the early 90s. But then the operation of the sensor was directed only to the control of the carburetor. That is, the light lights up when:

There was clogging;
It was incorrectly a combustible mixture for engine operation, etc.

Today, the work of the bulb is much wider. Carburetors in cars have no new sample. Instead of it installed injectors. It is in connection with this novelty in the car the bulb shows not only the wrong mixture. Thanks to her, the driver finds out about:

Interruptions in work;
Ignition problems;
Poor gear shift and much more.

See what else can evidence the burning engine check light (video)

Outcome

Thus, thanks to this light bulb on the panel, almost every engine element, its condition and performance can be monitored.

The engine control light on the driver panel is a status indicator. If it burns not according to the rules, it is worth paying attention to this and go to the diagnosis. Timely elimination of breakage is a security guarantee and comfort on the road. Attentiveness to your car will exclude a breakdown at the most inopportune moment.

It would seem what to talk about? The reserve data in the fuel tank must be contained in the car manual. Or even easier: the route computer warns of a low fuel level and reports how much you can drive up to refueling. Not always. Other instead of concrete digits give out only docking, forcing me to panic still.

However, the authors of the instructions are often limited to general words. For example, the "Low fuel control lamp lights up when the fuel tank is almost empty." This is a quote from manuals. It also contains even the element of the drama: "The production of fuel reserve can endanger people in the car." Scary...

What threatens the "light bulb"

Similar exercises are found in the instructions of three bestsellers - Renault Logan, Renault Duster, Lada Largus. As under the car: "If the lamp lights up and does not go out, it is necessary to urgently fix the fuel tank." At the same time, in the manual of the related Renault Sandero, it is clearly indicated - "from the moment of the first lighting of the signal lamp you can drive another 50 km."

In the instructions for Lada Vest, there is a reference to the control lamp, and more should be described in the relevant section, but the link leads to nowhere. There is not even such a section as "car operation." There is a "acquaintance", "Driving", "Care" and "Practical Tips". On the contrary, Lada is 4x4 - specific data (see the table). Chevrolet Niva. Looks like the legacy of Soviet times. But the Japanese, and Europeans (Germans and Czechs) are also accurate.

Loading panic!

As you can see, to find an answer to the question, how much and how far you can go "on the light bulb", I pasted instructions for the operation of the most popular cars in Russia. The data reduced to the table. Conclusion: The minimum fuel reserve that automakers provide us is 5 liters, in most cases there are about 7 liters. This should be enough at least 90 kilometers when driving around the country track by car in-class. So to panic, seeing a light fuel inhabited lamp or a written warning that the tank is almost empty, it is not worth it - if you, of course, not in the tundra or the desert. Before the refueling will be tied.

To find out where the nearest, look at the navigator map, including POI and putting a gas station filter. No navigator - Stop to use a smartphone or tablet. Short-term stop does not hurt. Of course, it is better to find a network refueling with high-quality gasoline, but if there is no guarantee that such a close, it is better not to risk and refueling on the first one - the minimum. You will reach decent - will fool a full tank and dilute the fuel of questionable quality. And wait a couple of seconds after switching on the ignition before the motor starting: let the pump type normal gasoline.

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