The performance of a number of systems and the car engine must be constantly monitored in order to notice the problem in time in the event of a malfunction. To control the functioning of such systems on dashboard information sensors and signal lamps are displayed on the front panel. The instrument cluster and the number of lamp sensors are different, but on all machines there is always an oil pressure lamp.
Previously, a pressure gauge was installed on the dashboard showing the pressure in the lubrication system. Currently, such sensors are used only for sports models, and on conventional machines only an oil pressure warning light is installed, which lights up if the pressure drops.

HOW OIL PRESSURE INDICATOR WORKS

Pressure control in the lubrication system is implemented simply. A sensor is installed in one of the channels of the lubrication system, which reacts to pressure changes. With a control lamp on the dashboard, this sensor is connected by an electrical circuit.

The principle of operation of this scheme is also simple. If there is no pressure, then the sensor closes the circuit, so when the ignition is turned on, the light comes on, indicating that the electrical circuit is working. After starting the engine, oil pump pumps oil, so pressure rises in the channels. When a certain value is reached, the sensor opens the circuit and the light goes out.

The sensor itself is set to the minimum pressure that is necessary for normal engine operation. On the different models this indicator is different, on some motors the indicator is 0.3 - 0.4 kgf / cm2 for Idling, at revolutions of 2000-3000 and more 0.5-0.7 kgf / cm2.

When operating the machine, a problem arises when the pressure warning lamp lights up on a running engine, and its glow may be different. For some, the control indicator lights up at idle and the glow is dim, for others, the signal is bright and appears at medium and high revs. If the lamp is on idling lights up, and when the movement fades, then you need to look for the cause.

And under whatever conditions the warning system does not work, measures must be taken immediately. The lubrication system directly affects the performance of the motor and its malfunction will result in serious damage.

The first thing the driver should do when the lubrication pressure light comes on is to stop driving and stop the engine. The next step is to identify the cause of the alert.

WHY IS THE LAMP ON?

The oil pressure lamp lights up for the following reasons:

1. disadvantage lubricant in the lubrication system.
2. Break in the electrical circuit.
3. Sensor malfunctions.
4. Defective oil filter.
5. Clogged oil pickup screen.
6. Reducing valve sticking.
7. Oil pump wear.

Because the reasons for triggering signal lamp- a lot, then we start the search for the cause with the simplest.

LACK OF OIL

Oil pump with oil receiver at the bottom of the sump

After stopping the car, check the oil level. This is not done right away. It is necessary to turn off the engine and wait for some time 5-7 minutes so that the grease can drain into the sump. If you check the level immediately, the readings will be incorrect (there will be less oil).

Lack of oil is one of the most common causes of tripping. signal light, usually manifested by the ignition of a lamp with a dim glow at idle.

WIRING AND SENSOR

Faulty oil pressure sensor (torn diaphragm)

An open circuit or loss of contact at the wiring connections can also cause the warning light to come on. And if the level check showed a normal amount of lubricant, then we check the power circuit. It is not difficult to do this - we start the engine, and if the lamp does not go out, disconnect the wire from the sensor. Such an action also opens the circuit and the control should go out. Then we apply the wire to the "mass" (any unpainted metal surface). With this procedure, we close the circuit bypassing the sensor and the lamp should light up. If it burns even after disconnecting the wiring from the sensor, there is a short to ground in the light bulb power wiring. To eliminate, it is located and isolated to find the place of the circuit.

Often the pressure lamp lights up due to a malfunction of the sensor itself. To check, you need a multimeter and a tire pump.

Diagnostics is performed as follows: we connect the sensor to a multimeter set to the resistance measurement mode (we connect one probe to the output, the second to the body of the part). In this case, the device should show a minimum resistance, since the circuit in it is closed inside. Then we connect a pump to the sensor (to the fitting with which the sensor is screwed into the engine) and, without turning off the multimeter, make a sharp pump. The pump will create pressure, which in a working element should break the circuit and the device will show infinite resistance. If pumping by the pump does not lead to changes in the sensor readings, it is faulty and needs to be replaced.

FILTER FAILURE AND OIL SENSOR SCREEN Clogged

The problem with the oil pressure lamp often occurs after scheduled replacement lubricant and filter element. In this case, most often "guilty" oil filter.
The filter should retain some of the oil after the engine stops. This allows the pump to build up pressure almost instantly when the engine is started. But if the filter element is defective, then the grease from it drains into the sump after the engine stops. Therefore, when the motor is started, the pressure light will light up, because the pump needs time to pump lubricant into the channels. The problem is solved by replacing the filter element.

Partially clogged oil pickup screen

When the engine is running, the oil washes the surfaces and washes away the wear products. These products settle on various surfaces, including the oil intake grid. The grid gets clogged and throughput oil pan falls. As a result, the pump cannot supply required amount oil, which causes the light to come on. To fix the problem, you will have to remove the pallet and clean the grid.

VALVE AND PUMP

The pressure reducing valve is used to prevent the pump from building up excessive pressure. When a certain pressure value is reached, this valve opens slightly, and part of the oil is discharged into the sump. But if this valve sticks in the half-open position, then some of the lubricant constantly drains, so the pump cannot pump the required amount of lubricant. The problem with the valve is eliminated by replacing or cleaning.

Due to the development on the shaft of the oil pump, play may appear

The pump is the last element that can cause the control to catch fire. Although the car uses gear-type pumps that differ great resource, but gradually it wears out and its performance drops because of which the desired pressure is not reached. A defective pump must be replaced.

Note that the movement to the place of repair "on its own" can only be carried out if there is an exact certainty that the problem lies in the sensor or wiring. In other cases, the car cannot be operated and for transportation it will be necessary to call a tow truck or tow it.

Perhaps the most serious signal the driver is informed about engine problems by the oil pressure lamp, regardless of whether it lights up while driving or at idle. A burning "Check" can be ignored, but a red oiler on the instrument panel cannot be ignored.

Hot pressure sensor light blinking

It happens that the light does not burn constantly, but blinks. If the engine consumes excessive oil, its level may drop below the critical level. In this case, on bumps and slopes, the oil intake will grab air. This problem is characterized by the fact that it manifests itself only during movement. To diagnose a problem, you need to check the oil level and add it to the required mark.

More often than others, this difficulty may be encountered sports cars and those that are operated in mountainous areas.

Advice. Experienced drivers, on roads rich in steep long climbs, fill in one and a half levels of oil to avoid a dry oil receiver. And on flat areas, bring it back to a normal level, draining excess oil until next time.

If the indicator blinks when the engine is running, when the car is stationary, the cause of the malfunction is in the sensor itself. Most likely, it gives the wrong signal, and can let oil through, both to the street and to the contacts inside itself (responsible for turning on control lamp). In this case, during an external examination, you can see streaks and drops of oil on the sensor housing.

It happens that the blinking and burning of the pointer appears under certain conditions and modes of operation

At idle

Drivers often notice the described problem when the engine is warm, especially in hot weather.

The idle speed of the engine is about 900 per minute. In this case, the oil pump must generate a pressure of up to 2 bar. This applies to both classics and VAZs of the tenth family, as well as Kalina, Priora and others (the principle of operation of the lubrication system, and the pressure value changes slightly).

When the oil heats up, it becomes more liquid, and idling can no longer provide the required pressure indicator. When it falls in the system, a light comes on (some cars also have a dial gauge showing the pressure). However, if you add speed, the light goes out, and the arrow rises.

Video educational program about the main causes of the oil pressure light on

On vehicles with hydraulic lash adjusters valve mechanism, low pressure can also be detected by a characteristic clicking noise under the head cover. And if you increase the speed, the pressure increases and the knock stops. After some time (less than a minute of idling), the sound appears again.

With such a malfunction, the car will be able to drive for some time, but you should not delay making an accurate “diagnosis”. long oil starvation ICE, one day it will result in a serious repair.

When the engine is warm

The normal pressure indicator for Lada at operating temperature and turns:

• About 5400 / minute, is 4.5 - 6 bar;
• 3000/minute - about 4 bar.

Drivers using mineral oil are well aware of the pressure drop on a warm engine. Immediately after starting, everything is in order, but if the engine warms up longer, the light starts to glow, and goes out only when the speed is added.

Peculiarity mineral oil in that it reacts more intensively to temperature than synthetics and semi-synthetics. When heated - cooled, it changes viscosity more strongly. In this case, you can try using a semi-synthetic or synthetic oil.

Important. Do not use an oil type prohibited by the manufacturer for a particular engine.

On a cold

If it's hot liquid oil cannot provide sufficient pressure due to leakage through the mating parts of the rubbing parts, then at low temperatures another problem is that the oil is too thick if it does not match weather conditions. It cannot quickly fill all the channels and get to the sensor. There are many obstacles in the way of thick oil:

• Mesh oil intake;
• Filter;
• Long narrow channels, etc.

Knowing this, it is important to select the viscosity of the oil according to the season, and periodically clean the system with special flushing agents.

Unsuitable thickened oil increases the load on the oil pump drive. And if it doesn't work in time pressure reducing valve(relieving excess pressure), the actuator may be damaged, "cut off". In this case, the control lamp does not go out at all, even if you put the car in warm garage or to warm up the oil in another way. With such a breakdown, the operation of the car is strictly prohibited, the failed part must be replaced.

If the indicator lights up immediately after the ignition is turned on, and lights up for a while after starting the engine, this is normal, but not more than 5 seconds. As the parts wear, the gaps increase and so does the burning time. This is a signal of what needs to be done soon. overhaul ICE.

Some tips on what you can do yourself:

• Check that the sensor is working, for example, by replacing it with a known good one. Alternatively, you can screw in its place a mechanical control sensor with a dial indicator. Please note that the engines of Lada Kalina cars with eight and 16 valve modifications were equipped with different sensors!
• Be sure to change the filter and oil. old filter clogged and obstructs the flow of oil. Even a new low-quality consumable can cause the light to blink.

• When changing the oil, it's time to remove the engine pan and check the condition of the oil receiver. From practice: on the VAZ 2114, the receiving mesh clogged up, after washing it hot water, the pressure in the system is restored. Sealant particles or shavings may also enter the crankcase. Note! Red or blue heat resistant sealant is not too good choice for mounting the sump and other parts in contact with oil that are not subject to strong heat. It does not provide sufficient traction and can get into the oil receiver. It is also important not to apply too much sealant and wait for the time set according to the instructions.
• The sump itself may be damaged and interfere with normal oil intake. A dent may appear due to an impact during a trip.
• In older engines, as they wear out and the gaps between the rubbing elements increase, it is allowed to use thicker oil in the summer (this is a temporary measure, designed to reduce wear on parts until the owner has the opportunity to overhaul). Naturally, this is contraindicated in winter.
• Check the relief valve as well. Foreign particles can get into it, or the spring weakens. In both cases, the valve remains ajar and begins to drive oil through itself and dump it into the crankcase without supplying it to the engine. The indicator in this case will burn under any conditions, regardless of temperature and speed.
• If a sharp drop in pressure occurs on the highway while driving, you need to stop immediately. First of all, you need to look from below - if the engine sump is broken. Then check for oil leaks under the filter, maybe it just wasn’t fully tightened during a recent maintenance. After 2 - 3 minutes after stopping the engine, check the level on the dipstick (it is pulled out, wiped, inserted dry and pulled out again to measure the level). With a normal indicator, check electrical circuit from the oil sensor (pads in the wires, wire integrity)

Please note that the pressure indicator engine lubricants- is not an oil level indicator (the driver himself is responsible for monitoring the indicator, which should be between the marks or closer to the top). The lamp lights up only in the most extreme cases when the engine requires urgent intervention.

These are the most common reasons for the oil pressure indicator lamp to come on (on, flashing, does not go out for a long time) during start-up and idling.

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Many drivers wonder why the oil pressure light is blinking or constantly on. This is not surprising, because this indicator is a visual confirmation of the presence of a sufficient number of atmospheres in the oil line.

Attention! If there is no pressure in the system at all or its level is insufficient, a visual signal is received.

Why does the oil pressure light come on? The main reasons are shown in the video:

How the system works

To understand the reason why the oil pressure lamp is on, you need to understand a little about the principle of the system. The whole process is as follows: the lubricant enters the key components of the car, in which the highest friction is observed; this avoids premature wear and overheating.

Oil ensures the normal operation of the bearings of such devices:

• crankshaft;
• turbocharger rotor;
• camshaft.

The supply of lubricant to these key components also ensures proper operation. hydraulic compensators in valves, timing phase regulator and hydraulic tensioners for belts.

What if there is not enough oil

If the lubricant does not enter the key nodes in enough, then soon there will be teases. In the worst case scenario, anti-friction liners will begin to melt.

Attention! The result of insufficient lubrication will be jamming of both shafts, as well as free rotation of the liners.

Therefore, if you see that the oil pressure lamp is on, you must stop operation until the reasons are clarified. It will be possible to continue normal use of the vehicle only after finding out the reasons.

When not to worry

Usually, if the lamp turns on for a few seconds, then this is not something to worry about. Not only that, this can happen even when the body tilts a lot when turning. Even cold start can trigger its activation.

Before conducting primary diagnostics, simply check how much oil is now in the system. Perhaps you just forgot to fill it in, or performed poorly in the service station service works.

The lamp can also be activated when the oil in the system is new. It lights up after the first start. She usually turns off after 20 seconds, provided that the substance you filled in good quality . If it does not go out, the problem lies much deeper and it will take several tests to determine it.

Why is it burning

There are a number of reasons why the oil pressure lamp may turn on. The most unlikely is a malfunction of the sensor itself. However, this reason cannot be completely ruled out.

Checking with a pressure gauge

Checking the sensor is quite simple. All you need is a manometer. The following tests follow:

1. Measure the pressure with a pressure gauge. This will let you know why the oil pressure light is on. In this case, the engine must be well warmed up. . If at 2000 rpm the device shows two bars or more, the problem is in the sensor.
2. If the pressure is less than two bar, it is necessary to remove the sump and remove the pump. Your task is to clear the grid. Also, during inspection, there should be no cracks or holes in the tube. Don't forget to check the gears for wear.
3. Replace damaged structural elements. Most likely it is because of them that the oil pressure lamp is on.

After that, you can find out why the oil pressure lamp is on. More precisely, this will be one of the steps towards finding out the real reason. If the pressure gauge check shows nothing, then you need to check electrical part and mechanics. This will help to find the reason why the pressure lamp is on or constantly flashing.

Checking the mechanics

First, warm up the engine and let it idle. If the oil pressure lamp is on, this indicates that the heated substance flows freely from the bearing gaps.

When the car is in long-term operation without proper maintenance, this happens quite often. The bearings simply get too big and the oil flows out unhindered. In most cases, replacing them is enough to restore performance.

The third reason that the oil pressure lamp is on may be the failure of the gear pair. There may also be interruptions in the operation of the pump, which is responsible for creating right level system pressure.

As long as the pump is in good condition, the light does not flash. This creates a pressure level slightly higher than usual. It is important to understand that the performance of the pump directly depends on crankshaft. Simply put, if the crankshaft does not rotate fast enough, then there will not be the number of atmospheres necessary for the full operation of the system.

Attention! Minimum number of revolutions crankshaft outputs at idle. That is why, if it malfunctions, the lamp flashes in this engine operating mode.

Checking the electrical part

Quite often, the pressure lamp may not light due to problems in the electrical network. To make sure that everything is in order with it, you must perform the following steps:

• find the brown wire and disconnect it from the sensor. After that, you need to bring it to the mass. When XX mode is activated, the lamp should flash. At the end, put the cable back in place;
• the second step is to disconnect the already white cable. At the same time, the revolutions should cross the line of 2000. After one second, the lamp should be on, or rather, flashing. Wait three seconds. There must be an audio signal. Return everything as it was.

If these two tests pass normally, then with electrical part everything is in order and the only option is to contact service center.

All these methods help to determine the cause of the breakdown. For more exact definition need for diagnostics modern technology, which allows you to detect with high accuracy why the lamp is flashing.

Usually, if the oil pressure lamp is on, the driver can quickly cope with this task on his own. A series of simple tests will allow you to find out exactly what the cause is and carry out restoration work.

Some more information on next video:

On the dashboard in the cabin of any car there are light bulbs, the purpose of which is to signal the driver about the presence of certain malfunctions. Each of the control lights is connected to its own sensor, which transmits data about a problem or failure. Thus, the driver is informed about the occurrence of failures and breakdowns in various systems car. The oil pressure sensor is responsible for the level of lubrication of the rubbing parts of the propulsion unit. However, for what reasons the oil pressure lamp may light up and what needs to be done in a particular case, not every driver knows.

Why do you need an oil pressure lamp in a car

An oil pressure sensor is installed in each car by the manufacturer. Its purpose is to transmit dashboard a signal of a lack of oil in the engine unit (an icon in the form of a red oil can appears). In the event that, after ignition or while driving, the oil pressure light suddenly lights up, you should be concerned about the condition of the car's engine. Although the appearance of an indication is not yet a reason to immediately contact a service station or a car repair shop.

Fault indication is output from the sensor to the panel

In most cases, the car owner himself can identify the cause of such a signal and take action to eliminate the malfunction.

The appearance of a red oil pressure lamp on the instrument panel is a signal from the pressure sensor, which indicates the presence of at least one of these problems:

lack of lubrication in the engine;

excessive amount of oil in the engine unit;

insufficient oil pressure for operation;

property loss working fluid.

The factory calculated that the sensor will be possible to operate when the pressure in the system drops below 0.4 kg/cm.

That is, an indicator in the form of an oiler transmits information about failures and malfunctions that are directly related to the lubrication of moving parts. power unit. These problems are classified as the most dangerous for the machine, as they can quickly lead to the fact that the rubbing elements of the engine will jam.

Therefore, as soon as the oil pressure lamp lights up on the panel, it is necessary to immediately take measures to stop the operation of the engine unit and try to identify the cause of the sensor operation.

What to do if the oil pressure lamp in the car lights up

For each model domestic car the causes will be the same, but the actions may be different. As the main reasons for which the sensor may work and send a signal to the instrument panel, you can specify the following:

the oil level in the engine unit is below the Min mark;

appeared big gap between the crankshaft bearing and connecting rod;

engine oil receiver mesh is seriously clogged;

malfunctions in the oil pump;

Malfunctions in the oil pressure sensor or in its wiring.

Actions that the driver must take when the oil can icon appears on the panel

After the driver has seen the red signal of the oil pressure indicator, further movement by car it is recommended to stop. It's best to park in free space on the side of the road or in a parking lot so as not to become an obstacle to other road users.

The first step is to check the oil level in the engine - this operation is within the power of any driver.

If the oil level is at a critical level, it is required to add liquid, however, so that its level does not exceed the Max value.

If the oil pressure light is still on, change the oil and filter. In most cases, it is because of the spent oil and a faulty filter that problems with the engine can occur.

In all other cases, specialist assistance will be required. To deliver the car to the service station, it is not recommended to start it, as the rubbing parts of the power unit can jam. It is better to use the services of a tow truck.

If the oil pressure lamp on the VAZ-2114 is on

The first step is to diagnose the cause of this signal. As a rule, everything is explained low level oil or forgetfulness of the driver in time to change the oil and filter.

The oil can icon is in the lower left corner

If the oil pressure lamp on the VAZ-2110 is on

Dozens have a more "capricious character" than VAZ cars of the 14th model. Therefore, it is quite possible that when an oil pressure lamp appears, a simple check of the oil level is not enough. You should look for all possible causes of breakdowns - contamination of the oil receiver mesh, failure of the pressure sensor, or installation of a faulty filter when changing the oil.

If all these elements are in working condition, it is likely that the liner in the crankshaft has worn out - then a major overhaul will be required. complex repair propulsion unit.

The oil pressure lamp is located on the right side

If the oil pressure lamp is on on the classic VAZ-2106, VAZ-2107

Structurally, the oil pressure sensor on the classic VAZ differs from more modern models. It only shows the presence of oil pressure in the system or its absence. In other words, the driver will only be notified of the most critical situations in the engine when there is any breakdown.

It is worth immediately turning off the engine and trying to figure out the situation: what is the oil level, are there any fluid leaks under the hood? Usually the appearance of a red oiler on the VAZ-2106, VAZ-2107 indicates incorrect work or failure of the oil pressure sensor itself, which is located on the engine, pump, or lack of oil in the engine crankcase.

The indicators of the oil pressure system are displayed in a separate panel

Why is the oil pressure light on at idle when the engine is fully warmed up

Very often, surprised car owners notice a signal in the form of an oiler on the instrument panel at idle. Engine fully warmed up, cold and thick oil excluded, because low temperatures the very quality of the oil can cause the sensor to trip.

In some cases, the oil pressure indicator starts blinking, less often it is constantly on. In both cases possible reasons malfunctions can be:

debris and dirt in the oil receiver;

severe wear of the oil pump or its failure;

a malfunction in the pressure sensor itself;

short circuit in the system;

crankshaft bearing wear.

All these reasons speak of the careless attitude of the owner to his car, since severe wear of spare parts and elements can be predicted and replaced in a timely manner, without waiting for failure.

After changing the oil, the oil pressure light is on: causes

Indeed, in some cases, immediately after changing the oil, the indicator in the form of an oiler lights up. The inclusion of a red icon can mean both simple and solvable problems, as well as more complex ones.

In particular, if the oil pressure light came on immediately after the ignition was turned on in the car, this may indicate that insufficient oil was poured into the engine. Check the oil level again and top up right amount working fluid.

It is also possible to consider the reason for using poor quality oil and filter. When choosing an oil filter for your car, you should pay attention to Special attention to the product brand. It is best to use the filters that are recommended by the manufacturer of your car. It is possible that when changing the oil, a low-quality or simply defective filter was installed that cannot hold oil. AT this case do not avoid repeated replacement of the fluid and filter.

High-quality components are ways to eliminate engine problems for a long time

A more serious problem will be a malfunction of the oil pump. As a rule, during the flushing of the engine before changing the oil, it experiences more pressure, and therefore, if the pump was already in a deplorable state, it is quite possible that after changing the oil it will fail. It is rather difficult to replace this spare part on your own - you will have to remove the engine pan, so it is advisable to contact a service station.

The oil pressure light comes on at low speeds, how can I fix this

Speaking of low engine speeds, drivers often mean idling machine or driving at minimum speed. As a rule, the number of engine revolutions does not exceed 1000.

The oil pressure sensor sends a signal to the instrument panel in cases where, at low engine speeds, for one reason or another, there is not enough oil.

Most likely, the oil receiver is clogged or the liner in the crankshaft is worn out. It is these reasons that characterize the insufficiency of the working fluid in the engine at low speeds.

If the problem is the presence of dirt and deposits in the oil receiver mesh, then the motorist can clean it himself. However, working with the crankshaft will require special thoughtfulness and special tool, since, depending on the degree of wear of the crankshaft, it may be necessary to overhaul the engine or replace the shaft with a new one.

The oil pressure light appears only at high speeds, what to do

High engine speeds suggest vehicle movement. That is, if the oil pressure light comes on while driving, this indicates a decrease in oil pressure of less than 0.5 kg / cm. And this mark is considered critical for the power unit, since there is not enough lubrication for correct operation elements rubbing against each other.

High engine speed is more than 4000 revolutions per minute. That is, the speed of the car is approximately 145 km / h. At these speeds, if the driver often operates the machine in this mode, oil is used faster - the engine needs a large amount of lubrication to operate under conditions of maximum use.

Accordingly, if the oil pressure lamp lights up at high speeds, then most likely the problem lies in the insufficient amount of oil itself. You will need to measure its level and add the required amount of oil to the engine.

In addition, due to a sharp transition to increased speed, the oil pump may fail. In the event that the pump is already very worn out and needs to be replaced, running at high speeds will most likely disable it. You will need to replace the part with a new one.

Why does the oil pressure lamp light up when braking, what does it mean

Some owners Vehicle notice that when braking hard, and sometimes when driving on rough roads, the red oil pressure indicator lights up. This is due to the fact that during especially sharp braking for various reasons (rough road, sharp turn, etc.), the engine speed drops. In this regard, the oil pressure in the system also drops sharply. Accordingly, if the oil pressure drops sharply, and there is little oil in the system, then the sensor is triggered automatically.

The indicator does not light when smooth and uniform motion- there is still enough oil for this level. But as soon as the driver makes a sharp braking, due to a sudden drop in pressure, the engine system begins to experience a sharp shortage of working fluid.

Therefore, if the oil pressure lamp lights up in your car during braking, you should immediately check the oil level in the engine unit. Most likely, the problem lies precisely in the lack of working fluid.

The oil pressure light alerts the driver to engine problems and signals immediate action. Each car owner knows that the performance of the car itself fully depends on the state of the engine unit, so it is very important to change oils and filters on time, as well as to monitor the condition of the oil level throughout the entire period of operation of the car.

Perhaps a very burning question - about the oil pressure light, when it lights up, the driver understands that something bad has happened to the engine, but what? How to understand? Today I will try to collect all the cases in which it can light up, this manifests itself on almost all engines, regardless of the number of valves, let it be. Often it can flash even at idle. In general, there are a lot of reasons, let's figure it out ...

I want to warn you right away that it is IMPOSSIBLE to ignore this sensor! It only lights up emergency cases, and your intervention and attention is definitely needed. If you stretch for some time, then you can simply "ditch" your unit, here and not far. So if the lamp lights up or starts flashing, we urgently understand.

About oil pressure

Previously, almost all cars were equipped with a special “screen”, where the pressure in the engine was indicated. The scale measured it in such units as - kgf / cm2. How more revs engine, the greater the pressure became, if it was not enough, then a special lamp lit up, which signaled about possible malfunctions. Now on modern cars this "screen" was removed, it has long been gone! Well, if only on some UAZ, and then not always, only the lamp remains. But normal pressure is desirable to know.

SO:

Normal pressure at idle (from 800 to 1000 rpm), from about 0.5 kgf / cm2. I would like to note that many have 16 valve motors it can be slightly more than about 0.6 kgf / cm2. This is because they are more resourceful and their oil is more liquid.

This pressure is measured by a special sensor, when the parameters deviate, it lights up a special lamp, which signals that something is not right with the engine. As a rule, if the pressure already drops to 0.4 kgf / cm2, then the lamp starts blinking or burns for a short time. Which already signals to you that something is not right here. But it’s not always about pressure, there are banal reasons, just the driver’s flaws.

Simple malfunctions - about "lubrication"

The very first and banal reason is - insufficient amount of oil in the engine . Beginners neglect the level and do it in vain. It is quite simple to determine - if it is dry, then it is worth sounding the alarm - MANDATORY add to the desired level, the engine experiences "". Fortunately, now the sensor is triggered at a critical, but acceptable level.

Second - not timely replacement! Some of us drive on oil for more than 20 or even 30,000 kilometers, it just turns into a mess, after which it is very difficult to clean the engine from the inside! Accordingly, if not liquid lubricant, then the lamp will signal you about this, such behavior is simply unacceptable. Often the motor can no longer be saved, this is especially pronounced on loaded units, for example, on TURBO. So we make a rule for ourselves, it is MANDATORY to change the oil, as the dealer ordered, and I would even change it even more often, for example, now that my warranty has run out, I change it after 10,000 km, instead of 15,000 recommended by the official dealer.

In 50% of cases, the indicator lights up precisely because of these reasons, so remember them, they are really important, if you follow these rules, then you may never have a sensor on.

Causes of medium severity - or maybe a sensor?

Here it is worth mentioning the options from which any driver is not protected, that is, practically not to blame. SO:

1) The pressure sensor is out of order - I already, this is a trite problem of Chevrolet engines, if the engine is not warmed up, then the oil corny “breaks through” the sensor, and it starts to “leak” - it does not show the correct data, even if you have a normal level, it will constantly signal you. What to do - just change! Many cars have such a problem, and therefore we warm the engines at idle in winter - a must! It happened like this, here's the video.

2) Not that oil ! Rarely, but it happens. Now, however, all manufacturers indicate the tolerance standards that need to be poured into their motor (for example, 5W - 40, 5W - 30), however, there are "ununderstanding" who can fill in the brand and tolerances that are not designed for your unit (for example, 0W - 20) , what's happening? Such oil is either very liquid, or, on the contrary, very thick, the pressure starts to jump from normal - the pressure lamp lights up! Therefore, we are not “wise”, we pour - what the doctor ordered. If you don’t know which one, go to the forums for your model, everything has already been written there for a long time.

3) Antifreeze or antifreeze getting into the engine crankcase . Unfortunately, this is not uncommon - it breaks the gasket between the engine block and the head, and the coolant simply flows into the oil. Accordingly, the lubricant loses its properties, becomes liquid and can no longer withstand the required pressure (that is, it falls below 0.4 kgf / cm2). It is easy to determine this malfunction, your coolant level will constantly go away, and there will be no drops under the car anywhere. And the oil level is constantly rising! In general, urgent measures must be taken, otherwise.

These are the reasons that already require intervention in the interior of the unit, but they are medium in severity, there are the most complex ones.

Complicated reasons - that the oil filter

Yes guys, oddly enough it sounds, but the oil filter can be the root cause, and this very often manifests itself.

1) Oil filter - if you change everything at the official station, then be sure that you will be supplied original spare parts. But there is no guarantee - when you do THAT yourself! As a rule, you buy non-original spare parts, which can often be counterfeit (assembled in artisanal factories in China), the key factor for you is the price, you can understand! But such filters simply cannot hold pressure, how does this manifest itself? Cold or standing engine for a long time - you try to start, it starts and after the first few seconds after starting, it can be about 3 to 10, the pressure lamp lights up, you can hear the knock of hydraulic lifters if you have them. The thing is that the oil filter must have a special valve (return) or washer (lock) that locks the oil when the engine is turned off, that is, it should not drain into the sump, but be in the system. This is true for normal manufacturers, but for “fake” ones, this is very far from reality - as a result, the oil drains and the engine needs some time to pump it back into the system! It's very bad going increased wear details, especially in moments maximum loads(in winter period)! What to do - just change the filter, you need to find a normal one, otherwise we will simply reduce the resource of the unit.

2) Pump - inside the motor there is a pump that pumps our lubricant, if it fails or clogs, then the oil supply also stops, or it goes with “stress” - we change it - we clean the pump. You need to remove the pan, sometimes you have to disassemble half the engine.

3) High engine wear . If your unit has traveled a huge number of kilometers, for example, about 400 - 500,000 km, then it may have worn out such spare parts as crankshaft liners, oil scraper rings, etc. it’s just that it’s time to “capitalize” it, though you will most likely have it. Also power will drop, will increase consumption, it will probably be "", even if the candles were cleaned. These are the causes of wear, nothing will save here - it needs to be repaired.