Why is the oil pressure light on VAZ 2114/2115

The lubrication system of an internal combustion engine performs four main functions: it reduces the friction force between the mating elements of the power unit, cools them, protects them from corrosion and cleans them of fuel combustion products and wear. To perform these functions, a certain oil pressure is maintained in the engine. Insufficient or excessive pressure will lead to rapid wear and destruction of rubbing parts. Pressure control is carried out using a special sensor and indicator (control lamp on the dashboard). We will tell you when this indicator lights up and what actions the car owner should take.

Operating principle of the lubrication system

Lubrication of moving engine components occurs according to the following principle: oil gradually flows into a recess located in the sump, after which it is sucked in by an oil pump, passed through an oil filter and again supplied to the loaded components.

The latter include:

crankshaft plain bearings;
cylinder walls;
cylinder head;
all gear mechanisms.

A sensor that monitors oil pressure is installed at the top of the cylinder head, at the point where the lubricant passages end. Thanks to this, the sensor monitors the oil at all stages of its movement, starting from the oil pump and ending with the camshaft.

The design of the ODM itself (oil pressure sensor) includes only three main parts - its housing, electronic contacts for signal transmission and a sensitive membrane. Depending on the oil pressure, it either closes the electrical circuit or opens it. If the pressure is less than the permissible threshold (0.65 Bar), then the sensor is triggered and the oil light for VAZ 2114 lights up on the panel.

As soon as the light comes on, you should stop driving as quickly as possible and search for possible faults. Operating a vehicle with an inoperative oil supply system can lead to rapid wear of moving parts and even engine failure.

Is it possible to drive with error 12?

It is not advisable to drive, especially on long trips, only if there is a suspicion of a malfunction of the generator or the behavior of the car is very different from usual. The car may stall and not start again. And delivering it to your home or to the place of repair may be associated with certain difficulties. But using a car with such a problem does not threaten anything more serious.

Despite the fact that this code in most cases does not pose any danger to the vehicle and its owner, you should not drive with it for too long. You should solve this problem yourself or with the help of a specialist as quickly as possible. Moreover, many reasons do not require significant financial costs.

Reasons why the indicator light may come on

The indicator light can light up both while driving and at idle speed. Before making assumptions about the causes of possible malfunctions, you should observe the behavior of the light bulb. If it lights up periodically and only while driving, the problem should be looked for in the sensor wiring. If the lamp lights up when the engine is idling and does not go out, this may be due to:

faulty pressure sensor;
low oil level;
too liquid (not corresponding to the class or expired) oil;
oil pump malfunction;
oil filter wear;
contamination of the oil receiver mesh;
wear of the crankshaft liners.

Let's consider each of these situations in more detail.

Sensor Wiring

Flashing of the indicator light while driving may be due to damaged insulation of the sensor wire. The wire, under the influence of vibration, shorts to the ground of the car, which causes the sensor to operate. This problem can be eliminated by thoroughly inspecting the wiring and replacing the damaged section.

One of the reasons for the light to come on may be damage to the pressure sensor wiring.

Sensor

In VAZ 2114/15 cars, the oil pressure sensor often fails. Most often, it is this that causes the indicator lamp to constantly burn. It is impossible to check its serviceability yourself. Usually a new sensor is purchased and installed.

A faulty VAZ 2114/15 pressure sensor often causes the oil pressure lamp to light up

Lubricant level and quality

If the indicator light is constantly on, you should check the oil level in the oil pan. This is done with a special probe on a cold engine. If the level is below the minimum allowable, you should add the substances and observe the behavior of the light bulb. If it went out, the problem was precisely the lack of lubrication.

Another reason for the indicator light to come on may be that the oil consistency is too thin. The fact is that the viscosity of the oil decreases with each kilometer traveled. If the car has traveled more than 10 thousand km without changing the oil, the oil pump, designed for a certain lubricant viscosity, will not be able to create the necessary pressure. In such cases, the light comes on only when the engine warms up to operating temperature. This is due to a decrease in oil viscosity due to heat.

Oil viscosity decreases over time, causing system pressure to drop.

This problem can be solved by simply changing the oil. If the indicator continues to light, troubleshooting should be continued.

Pressure measurement

To measure the oil pressure in the system, a liquid pressure gauge is used. The nozzle of its hose is screwed in instead of the pressure sensor. First, measure the pressure at idle speed of a warm engine. A pressure of 1.5 to 2 bar is considered normal. Then the measurements are repeated at high speeds (5000–5500 rpm). In this case it must be at least 4.5 bar.

If the pressure gauge shows values below those specified, you should check the oil pump, since it is the one that creates pressure in the system. It is not recommended to continue operating the vehicle in this case.

The main malfunctions of the oil pump are wear of its elements and “sticking” of the pressure relief valve in the open position. In this case, the easiest way is to replace the pump as a set. You can do this either yourself or at a car service center.

Error codes for the VDO combination on the instrument panel of the VAZ 2110

If 0 remains, then there are no errors
When 1 appears, it indicates a microprocessor malfunction
Open circuit of the fuel level indicator sensor
Error 4 - increased supply voltage of the on-board network over 16 Volts
Error 8 - low voltage, less than 8 Volts
In case of several malfunctions, a number may be issued simultaneously, which will be the sum of the above codes, for example 6 (2+4), 10 (2+8), 12 (4+8) or 14 (2+4+8)

To be honest, these fault codes are not particularly useful. If we compare it with the readings of special on-board computers, such as STAT, then there is, of course, tens of times more useful information and various data. But we’ll talk about this sometime in future articles.

My devices also turn off when you drive and there is some kind of sound, the fuel level also floats, they blow me exactly the same, nothing helped and I looked at the mass on the handbrake, also zero

On my instruments it shows 3456 on top and 78 on the bottom, what does this mean, please tell me

Engine 21124 16 valve

Hello ! Help with the problem, I came to the car yesterday, everything worked, before that I cleaned the injectors. The next day the car started up, but after running for 3-5 seconds it stalled and no more spark, no steering wheel sensor, changed it, then I relieve the pressure in the ramp and try to start it, it starts for 4 seconds and stalls. Where to dig?

Please tell me. I'm getting error 78. VAZ 21124 16v europanel 2007

Hello, my VAZ 10, 8 valves had error 14, I cleared it, do I need to go for diagnostics?

Hello, My VAZ 2110 car will not start. I barely started it with a tugboat, the idle doesn’t work and the throttle doesn’t work, but I need to rev it up, what should I do? Tell me. And error 8 shows how to find this malfunction.

VAZ 2112 16-valve, during self-diagnosis it displays error 818.2... help save what is being done)

Hello, the VAZ 2112 stopped starting, the on-board computer shows error 43210

Who can tell me what error number 8 is?

1 Microprocessor error 2 Fuel gauge sensor circuit error 4 High voltage 8 Low voltage 12 Indicator lamp diagnostic circuit faulty 13 No oxygen sensor/LAMDA probe signal 14 Coolant temperature sensor signal high 15 Coolant temperature sensor signal low 16 On-board voltage too high network 17 Low voltage on-board network 19 Incorrect crankshaft position sensor signal 21 High signal level of the throttle position sensor 22 Low level of the throttle position sensor signal 23 High level of the intake air temperature sensor signal 24 No signal from the vehicle speed sensor 25 Low level of the intake temperature sensor signal air 27 High signal level of the CO potentiometer 28 Low signal level of the CO potentiometer 33 High signal level of the mass air flow sensor For GM NIVA: High signal level of the absolute pressure sensor 34 Low signal level of the mass air flow sensor For GM NIVA: Low signal level of the absolute sensor pressure 35 Idle speed deviation 41 Incorrect phase sensor signal 42 Malfunction of the electronic ignition control circuit 43 Incorrect knock sensor signal 44 Lean mixture 45 Rich mixture 49 Vacuum loss diagnostics 51 EPROM error 52 RAM error 53 No CO potentiometer sensor signal For GM NIVA : increased voltage 54 No signal from the octane corrector sensor 55 Depletion at high engine load For GM NIVA: error in the electronic control unit 61 Degradation of the oxygen sensor/LAMDA probe

Errors persist until they are reset manually! Also mistakes add up! Those. If you have errors 8 and 14, the display will show error 22.

Please help, I stood there warming up for about five minutes, suddenly the car stalled, it started on its own, then, too, at first Troila played with rpms of 1000-1500 and stalled again, and as soon as you press the gas it immediately stalls

The crankshaft sensor or the crankshaft itself may also be the crankshaft gear

Hi, I do everything as in the video, but the diagnostics are not performed, it just switches the mileage to daily and that’s it.

Sergey, press this button on the panel and hold it while turning the ignition key, everything will show there

Why does the alarm sound?

The reasons why the VAZ 2114 oil pressure is on may be:

Damage to the oil pressure sensor.
A break in the wires connecting the pressure sensor to the electronic unit.
Low oil level in the system.
Oil pump failure.
Oil filter clogged.

Of all the above reasons, the last two pose the greatest danger to the moving parts of the vehicle. If the DDM itself breaks down, the cause can be eliminated literally in a matter of minutes. In addition to the above malfunctions, in which the signal in the form of an oil can on the dashboard lights up constantly, there are situations when it lights up periodically, either lighting up or going out.

The reasons for this behavior of the indicator may be:

clogged filter mesh on the oil intake of the pump, which leads to improper operation of the latter;
oil filter clogged;
low oil viscosity due to its wear (it was not replaced for a long time);
low oil viscosity due to gasoline entering the crankcase;
short circuit of the wires connecting the DDM with the indicator on the dashboard;
wear of crankshaft bearings.

Eliminating these causes will help completely get rid of the blinking pressure sensor on the panel.

About the block

The unit is a device with several indicators that light up when there is a malfunction or improper operation of the internal combustion engine. Each indicator has its own lamp, and if there is an error in a specific module or location, the lamp lights up, after which it is recommended to check the equipment to which the indicator refers.

The unit itself can be considered a simple on-board computer that monitors the condition of the car in real time. The unit is located on the center console. The location for this device was not chosen by chance in this particular location; it is perfectly readable and is always under the driver’s eyes, which will allow you to quickly notice errors in the car.

Useful tips

To prevent problems associated with a drop in oil pressure, the following recommendations should be followed:

Fill the engine with oil recommended by the car manufacturer, paying attention to the viscosity grade.
Change the oil and oil filter in a timely manner.
Do not use non-original spare parts for repairs.
At least once a quarter, carry out diagnostics of the lubrication system with mandatory pressure measurement.
If the pressure indicator light comes on, do not operate the vehicle until a complete diagnosis has been carried out.

Ignoring the oil pressure indicator signals can have serious consequences for the car engine. Any malfunction of the lubrication system can lead to a major overhaul of the power unit. Try to keep it in working condition and pay attention to all signals given by the indicator light.

Higher technical education

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PREPARATION FOR MEASUREMENTS

Engine compression is measured with a fully charged battery. After charging and installing the power source in place, check the starter. It shouldn't create any problems either. Then warm up the engine. Its temperature during measurements should be 70-90 O C.

It is necessary to unscrew all spark plugs from all holes. Also unscrew the fuel hose to stop the fuel supply. Prepare the compression gauge for use.

Compressometer

Oil level sensor

Electric -2114 allows you to control the amount of lubricating fluid in real time during vehicle operation. The signal from it is sent to the corresponding dashboard indicator, notifying the driver about the lack of oil level in the engine sump. Insufficient oil level in the car crankcase leads to engine failure and, as a consequence, to expensive and time-consuming repairs.

Therefore, it is necessary to ensure that there is always a sufficient amount of suitable engine oil in the engine. The volume is approximately 4 liters. When replacing it, the volume of newly filled engine oil is not less than the volume of drained fluid. Reaching the required level is determined using a measuring probe.

Operating principle of DUM

The oil level is based on the use of the properties of a reed switch (a reed switch is a sealed magnetically controlled contact) with make-break contacts. When the sensor is immersed in engine oil, its contacts are open and the indicator is . If the level is insufficient (there is no oil between the contacts of the reed switch), the contacts close, thereby turning on the electrical circuit of the control light on the car’s dashboard.

Helpful advice. While trusting the electrical readings, it is still recommended to check the engine oil level daily using a dipstick.

If the indicator of its insufficiency lights up, it is necessary to verify the reliability of the DUM readings. A measuring probe is used for this.

How to use the test probe

Checking the oil level using a dipstick is carried out as follows (the car must be horizontal):

remove the dipstick from the tube located under the hood in the front part of the engine compartment, wipe it and find the marked max and min marks;
install the probe back into the tube;
After 2-3 minutes, we take out the dipstick again and see where the upper edge of the oil mark is located on it. If the mark is between the min/max marks, then the amount of lubricant in the engine is normal, but the performance of the sensor is in doubt and must be checked.

Why does the DUM indicator light up?

If during a trip the oil level indicator suddenly lights up on the dashboard, you should immediately stop and find out the cause of this phenomenon. Of course, you shouldn’t panic because of this, as the reasons can be different:

There is not enough fluid in the car crankcase - you need to add oil to the oil filler neck to the required level. The oil to be added must be of the same type as that previously added. Otherwise the engine will fail.
The level sensor is faulty.

Attention: DUM cannot be repaired. If it breaks, it must be replaced with a new one.

The causes of failure of the DUM are classified as follows:

Oxidation of contacts;
Short circuit or break in the power supply circuits of the sensor and/or liquid level indicator;
Reed switch burnt out.

Breaks in the winding

If there is a break in the excitation winding, then the generator does not charge. This is determined simply. It is enough to touch the generator with your hand. If the winding breaks, the device will heat up. To diagnose more accurately, the end of the excitation winding is disconnected from the brush and connected to a terminal on the generator. The measurement is carried out using a multimeter from the battery.

If there are breaks, the multimeter will not show anything. If a signal lamp is used instead of the device, it will not light up. In order to find the problematic coil, wires from the battery are connected to each of them in turn. If the break is inside, the coil is replaced. External breaks are removed using a soldering iron.

oil pressure warning light

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Dimbasik 04 Dec 2009 Hello everyone! Tell me what the trick might be?

I turn on the ignition - 3 lamps light up as expected - check engine, battery and oil pressure. I start, drive, stop, turn off, turn on the ignition again - check-in, battery are on, oil pressure light is off. I noticed that it burns mainly when the engine is cold. Poor contact in the instrument panel or what is it? Tell me?

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alekssmol 04 Dec 2009 Hello everyone! Tell me what the trick might be?

Have you checked the oil level? and of course the contact on the sensor itself. try tapping it lightly

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kirill.evs 04 Dec 2009

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Dimbasik 04 Dec 2009

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anry Dec 04, 2009

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Compass 04 Dec 2009 10 seconds did not light up, which means the CPG is working.

First, try installing a sensor that is known to be good.

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Dimbasik 04 Dec 2009

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KOCTA 04 Dec 2009 also a thought! I understand you are talking about the oil pressure sensor at the oil filter? need to try.

There was such a malfunction, I replaced the oil pressure sensor, it seemed to disappear, but soon the lamp on the tidy came on again, then it didn’t. I found a burnt corrugation with wires, the pressure sensor wire was touching the exhaust manifold pipe (ground), the wire was insulated, and the corrugation pulled it off with zip ties.

The dashboard of the VAZ 2114 is blinking

Hello! This is the problem at idle: the panel backlight blinks and, in general, all the backlight in the car, if I give more gas, it stops blinking and blinks when driving, sometimes it stops blinking for 30 seconds, what could be the problem? where to climb? generator new eldix 135a maybe the tablet is just unscrewed? charging at full load 14.0 Check the chocolate bar, as a rule, blinking dimensions indicate a malfunction of the chocolate bar...

I have the same issue. The electrician measured the voltage from the generator (13.8V) and says everything is fine, don’t worry o_O If you solve the problem, write how.

Check the chocolate bar, as a rule, blinking dimensions indicate a malfunction of the chocolate bar...

I took off the generator and wanted to install the old drain (((here I thought, let me take it apart, I removed the new casing, I see everything is clearly shining)) I unscrew the voltage regulator and immediately the wire flies off it! That’s when I realized what my problem is))) bad contact on the regulator with I pressed it with brushes and pulled everything back)) I started the problem with the backlight flickering, solved)) at idle, charging with the fogs on, heater 3rd position, heated rear window, music for the whole daylight in the cabin on panel 13.8 on battery terminal 14.0

Why does my right green light blink and sometimes not chirp? Explain the reason?

The instrument panel in the VAZ 2114 failed - 3 answers
Speedometer needle freezes in VAZ 2114 - 2 answers
Speedometer needle freezes - 2 answers
Is there an exclamation mark in the circle of the VAZ 2115? – 2 answers
VAZ 2114 shows fuel level incorrectly - 1 answer

The contact is bad, so it blinks and clatters. Maybe it's loose in the panel or fuse box. You can also check in the headlights.

The light switch is acting up. You can ask a friend for a replacement. For check.

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Diagnostic features

Before replacing the old device, it must be removed and checked. The easiest way to check is to plug in a known-good device into the network.

Another way is to screw a pressure gauge in place of the sensor. If the tester shows a pressure of 0.65 kgf/cm2 or more, this indicates that the system has normal pressure and the cause is a faulty device.

If you don’t have a pressure gauge at hand, you can check the sensor in the following way:

unscrew the regulator;
crank the starter without starting the engine;
If oil flows from the socket, then the sensor is faulty and needs to be replaced.

Replacing the sensor

In a Priora car, replacing the oil pressure sensor is not very difficult even for novice car enthusiasts who do not have practical experience in plumbing. It is performed if the causes of the defect are determined, if the oil pressure sensor in the power plant lubrication system is on. The procedure for replacing the oil pressure sensor is as follows:

Turn off the power plant.
Remove the plastic motor cover.
We remove the car wiring block from the product.
We unscrew the device using a socket wrench and remove it from the technological hole in the body of the cylinder head.
When installing an updated product, it is necessary to install a metal sealing ring.
We are installing a new device. This completes the installation.

If the oil pressure sensor lights up even with the updated device, it is necessary to test the pressure value in the vehicle’s lubrication complex. For this purpose, instead of the removed device installed in the cylinder head of the engine unit, we screw in an adapter on which the pressure measuring device is installed.

When monitoring the pressure parameter in the lubrication system of the power plant, you should know that the indicator of this physical quantity on the engine at idle speed should be at least 0.5 bar.

The battery does not hold a charge

If the voltage at the terminals is less than 12.5 Volts, remove the battery for charging. After charging the battery to 12.7 V, leave it unused for 12-24 hours. Then check the voltage at the terminals or the density of the electrolyte. A working battery will not be discharged during such a period. The cause of the discharge could lie in overloading of power supplies by consumers, frequent short trips, or frost. There is a possibility that the generator is malfunctioning.

Find out the charging time of your battery

Buying a new battery before you are sure that the old one is unsuitable is irrational. But if you have a spare one and the ability to use a battery from another car, you can install it in place of yours while it is charging, and try to start the car and drive it for several kilometers.

If the light on the VAZ panel no longer lights up, the problem was a discharged battery. We are waiting for ours to charge. If it does not hold a charge, we buy a new one or, if we have the time, desire, and abilities, we restore the old one.

We fix problems ourselves

The oil can icon may not light up for various reasons:

wiring problems;
malfunction of the sensor itself;
the indicator light has burned out;
The fluidity of the oil is temporarily impaired due to low temperatures and prolonged storage.

The first three reasons can be considered a signal to action, since they must be eliminated as soon as possible for safe operation of the machine. The fourth reason has only one way out - start the engine and wait for the oil to spread throughout all components and parts.

The first indicator on the left shows malfunctions in the engine lubrication system

Preparing tools for repair

To troubleshoot the oil pressure light, you may need the following tools and devices:

screwdriver with a flat thin blade;
pressure gauge;
new indicator light;
wires;
sensor.

Operating procedure

First of all, car enthusiasts are advised to start by inspecting the sensor and its connector, and only then move on to solving other issues.

If the sensor has a whole body and the connector is connected correctly, then it is recommended to check other elements of the system

To make it easier to find a fault, it is better to adhere to the following operating scheme:

Check the connector that connects to the oil pressure sensor. As a rule, the sensor is located on the engine cylinder block, usually on the rear side. You can find out the exact location of this element in your car's manual. It is recommended to remove the connector, make sure that it is clean and free of dirt, and then connect it back. If this simple procedure does not help, move on to the second point.
Measure the oil pressure with a pressure gauge. It should be within the range specified in your vehicle's owner's manual. If this is not the case, change the oil pressure sensor.
After this, you can remove the wiring from the sensor and connect it to the engine ground. If the oil can in the passenger compartment does not start to burn, then you will have to check the entire wiring or change the indicator light.
It is easier to replace the light bulb on the indicator - it is quite possible that it has simply burned out, and therefore does not light up at those moments when it is necessary. It is enough to remove the protective strip from the instrument panel, unscrew the old lamp and insert a new one.
If this does not help, then the last chance to fix the problem is to replace the wires. You can usually visually notice abrasions or breaks. It is recommended to immediately replace the entire wire rather than trying to rewind it with electrical tape.

Pinout of the VAZ-2114 window lifter button

If you look at both halves, into which the VAZ-2114 window lift button was disassembled, then two rows of contacts and sockets for them clearly appear. One has four elements, the other three. This missing contact is considered the starting point for the subsequent pinout of the VAZ-2114 window lifter button.

With half of the body facing towards you, the contacts are numbered. Each “tooth” corresponds to a wire of a different color.

Yellow. It connects to the dimensions and serves as a “plus”.
Black. You can connect it to the negative side of the battery or connect it to ground.
Red. This is a nutritional plus. Can be connected to a battery. Then the VAZ-2114 window lifter will work both with the ignition on and not. If the driver wants to get a working mechanism only when the engine is started, it should be connected to a similar plus of another unit.
Green. Output to window lift motor.
Blue. Output to window lift motor. If the 4th and 5th nodes are swapped, the device will work. But instead of an up arrow, the glass will go down. And vice versa.
The sixth and seventh ones are automatically connected by “mice” to black, that is, to ground. But some recommendations suggest that this action is not advisable. It is better to connect to the battery.

The fundamental difference between whether the contact is connected to a battery or to another source is that in the first option the mechanism will work even when the ignition is turned off. And the pinout in these cases is relative.

WHAT TO DO IF YOU DO NOT HAVE A COMPRESSOMETER AT HAND?

Is it possible to measure compression without a device? Practice shows that yes, it is possible. But this method will give relative and approximate readings. To measure the compression indicator without instruments, remove the spark plugs from all cylinders except the one being tested. Manually rotate the crankshaft until the compression stroke ends (watch the marks - they should match). Perform this operation on all cylinders one by one. Where the pressure is low, it will take less effort to turn the crankshaft. In this way, of course, you will not get accurate compression readings in the engine. But it is possible to understand the presence of problems.

It is recommended to measure compression every 20-30 thousand kilometers, so every car enthusiast is recommended to have his own compression gauge. Its price is not so high that it is worth saving on it.

The approximate price of a device for measuring engine compression in online stores in the capital is from 600 rubles to 2 thousand. Branded models from Western manufacturers are more expensive – up to 8 thousand. In the regions, a device for measuring compression costs no more than in the capital. Its price varies depending on the manufacturer.

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