Oil pressure sensor for VAZ 2107 - how to change it, how much it costs

For any modern car, the source of stable and proper operation is the engine. It is this node that is otherwise called the “heart of the machine.” For the operation of the power unit, a lubricant is required - oil, which ensures the sliding of parts without their deformation and friction against each other. In this regard, the VAZ-2107, like any modern vehicle, has a sensor that is responsible for the oil pressure in the system.

The oil pressure sensor on the VAZ-2107 is available on any engine, regardless of the injector or carburetor. It can be found in the lower left side of the engine, near the gearbox and steering column. On some more modern cars of this model, the DDM is located on the end side of the cylinder head, not far from the left timing shaft bearing.

The sensor is available in two varieties: electronic and mechanical. The electronic sensor turns on a light signal when the oil pressure decreases. Mechanical DDM determines not only the pressure value, but also allows you to control it.

The information is sent to the control lamp and if a problem occurs in the engine - a decrease or sharp increase in fluid pressure, a corresponding indicator appears on the dashboard. If the light comes on too often, this may indicate a malfunction in the oil supply or a breakdown of the sensor itself.

It is thanks to this device that the driver can understand how efficiently the engine operates. The oil pressure sensor may become faulty for the following reasons:

• oxidation of contacts;
• presence of blockage at the inlet of the DDM;

• poor attachment to the engine;

Another important reason for the breakdown of the oil pressure sensor on the VAZ-2107 is its overheating or mechanical damage to the device.

Checking the functionality and replacing the sensor

Like any part of the DDM, it can fail. It is known that without oil, the engine of any car cannot operate for a long time. It protects parts from wear, helps the engine cool and prevents overheating. This makes the process of monitoring oil level and quality necessary. In addition, an important indicator is its pressure.

First of all, you should carefully inspect the sensor. The absence of mechanical damage on the sensor does not yet indicate the absence of malfunctions. Damage to the sensor can be not only mechanical, but also technical in nature. Therefore, the process of checking the oil pressure sensor is very important.

When a signal appears about a change in pressure in the system, it becomes necessary to check the functionality of the sensor. First, the integrity of the power supply is externally assessed and the oil level in the system is measured with a dipstick. After this, you can begin checking the sensor itself.

To do this, you need to perform a number of actions:

• Unscrew the sensor.
• Install a pressure gauge in its place.
• Start the engine.
• Analyze the information from the pressure gauge (if the pressure reading is more than 0.35 kg/cm2, then the sensor is working).

If there is no pressure gauge, then the pressure can be checked in another way. You should unscrew the DDM, turn on the starter, and if oil splashes fly out of the hole, it means that lubrication is carried out normally, and the pressure sensor has failed. As a rule, the price of a new oil pressure sensor for a VAZ-2107 with article number 695306 is 100-150 rubles, depending on the manufacturer.

If we talk about the process of replacing the DDM itself, it does not have any difficulties. Before replacing, it is necessary to clean the sensor from dust and dirt, as debris from a faulty sensor can get into the engine.

Then the contact wire is disconnected from the sensor, and the removed negative terminal from the battery is installed in its place. Using a 21 mm wrench, the sensor is loosened, after which you can easily unscrew it. Then the new sensor is screwed in, the contact wire is attached and the battery terminal is returned to its place.

Device

Components:

• a housing with a connector for connecting a wire on one side and a thread for screwing in on the other;
• diaphragm with metal plate and positive contact;
• a spring pushing the diaphragm;
• negative contact on the housing (ground).

The oil pressure sensor is located in an easily accessible location for replacement or maintenance. It is located on the rear of the right wall of the engine block.

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What to do if the sensor lights up

If the oil pressure light on the dashboard comes on, you must first turn off the engine and try to understand the cause of the problem in order to find the most optimal solution to the problem.

Thus, the oil pressure sensor on the VAZ-2107 plays a very important role in ensuring stable operation. To do this, it is necessary to constantly monitor the serviceability of the DDM and, if necessary, replace it immediately.

Where is the sensor located

The most common places where it is found are near the oil filter, in the upper part of the engine near the camshaft block, or pump.

Let's look at specific models:

1. VAZ 2108/09/099. Located on the top right side of the engine (when viewed in the direction of travel) next to the timing belt cover. There is only one wire coming from it. This arrangement is also typical for 8-valve engines on the VAZ 2110/11.
2. VAZ 2110/11 16 valve engine. Located on the left side of the engine (when viewed in the direction of travel) on the driver's side on the camshaft block between the air filter, ignition module and oil filler neck.
3. VAZ 2112, 16-valve engine. It is located on the top left side (look along the way). To find it you need to remove the air filter.
4. VAZ 2114. Located on the right inner side of the engine on the cylinder head next to the timing belt. It is clearly visible from above. To dismantle it, remove the protective cap, the terminal and turn it out with a 21 key.
5. Lada Kalina. Located on the right rear of the engine near the timing belt, one wire comes from it. To get to it you need to remove the plastic cover of the cylinder block.
6. Lada Priora. Located on the left (when viewed along the way) on top of the cylinder block under the intake air manifold. To dismantle it, you must first remove the protective plastic cover of the engine, move the air manifold and unscrew it with a 21 mm socket wrench. It sits very tight.
7. Lada Granta 8 and 16 valve engine. Located on the top right side of the engine near the timing belt cover. To remove it, you can use a spark plug wrench or a 21 open-end wrench.
8. GAZ "Gazelle" (engine ZMZ-405). Located on the BC, top right. There is only one wire coming from it.

The most common wrench size for removing the sensor is 21. You can use a spark plug wrench. But it all depends on the specific brand of car.

After the pressure sensor has been removed, the seat is tightly covered with a clean rag so that dirt does not get there and oil does not leak out during possible engine operation.

It would be a good idea to measure the oil pressure in the system at idle, medium and high speeds. To do this, use a pressure gauge, which is screwed in instead of the DDM

To take accurate readings, it is important to ensure a tight connection

For each car model, the values ​​may differ. These can be found in the instruction manual.

For example, for a VAZ 2112 there are 16 valves, the standard engine oil pressure is:

• at idle speed 2 BAR.
• at 5 thousand revolutions from 4.5 to 6.5 BAR.

If all the readings are normal and the light is constantly on, then the information does not reach the ECU or gets distorted. This may be due to the sensor, which needs to be checked.

Installing the oil pressure indicator in the 2107 tidy

I have long wanted to know the oil pressure in the system, and then a couple of months ago I came across an article where it was written that the pressure gauge from GAZ 3302 fits perfectly into the 7-position panel. I looked for this pointer for a long time, in the end I found it at a price of 550 rubles (ppt), but it’s a bit expensive for a small pointer. Here is a photo of it immediately after purchase

In general, they write that it is 1 in 1 as a fuel level indicator, only the picture is different. I didn’t want to redraw anything there, so I was looking for the GAZ 3302 indicator. Well, then it started… I removed the instrument panel, here is its number

I pulled out the economizer that no one needed, drilled holes for a new indicator

tried on a new pointer

It would seem that everything was fine, BUT a HUGE problem was finding nuts with a 2mm thread to screw this indicator, but I found it after visiting all the stores, broke all the stash in the garage, and in the end my dad found it somewhere at home))

Then I screwed the whole thing through a PCB plate like

Then I took the “+” and “-” from the dashboard with the wiring, and under the control from the sensor I added a “folder” so that it could be disconnected, well, in human terms))

It turned out something like this

The connected wiring looks something like this

Then I found in my dad’s stashes a spacer adapter and the pressure sensor itself

made in USSR

Cleaned the block, unscrewed the original sensor

screwed in the adapter and spacer, and then screwed in the critical pressure sensor

The result is: Idle

I don't know why it's in red, maybe the sensor is being calibrated, or maybe the pointer is designed for slightly different calibrations

But at 3000 rpm everything is fine

While I was climbing under the panel, I also decided to “calm down” the tank needle, for this I used two capacitors of 10,000 microfarats for 25 volts (they cost 150 rubles each).

That's all for now)) thank you everyone

Oil light blinking

Hello everyone! The car is a VAZ 2107 carburetor.
For about 3 days now the oil pressure light on the dashboard has been blinking periodically. Sometimes it disappears, sometimes it blinks while driving. In addition, the idle speed when warmed up became approximately 600, but was about 1000 and fluctuates slightly. But this happened with the speed even before the light came on, as well as some jerks and dips when accelerating. Tell me, what is the problem? Is it all interconnected, or are there different problems? Where to dig? PS: The deadline has come - I’ve been wanting to change the oil and filter in the engine for a week now! The level on the dipstick is above the minimum , change the oil, adjust the idle

Yes, what happened, what helped

Does the pressure light up on a hot or cold engine? the difference is

so maybe it's the oil? It’s just that if it was on when it was cold, it would definitely be wear and tear on the oil pump

a friend said that I could kill the oil pickup) if it hit the pan)

clean the carb and tune xx

If you increase the speed and the light goes out, change the oil filter 100%.

There was such a problem. and 2 times. Changing the oil and filter helped both times. When it's hot, the revs drop, the light comes on and the car sometimes even stalls. used to be Lukoil (total shit). It liquefies quickly and the pressure disappears. I advise you not to skimp on oil and buy MOTUL 6100 10w-40. Lei, you won’t regret it, it costs about 1200-1300 for 4 liters. you will feel the difference... if there is anything, please contact me

I always use Shell Helix 10W40) I’ll replace it today

As an option. Something has gotten into the oil pump safety valve and some of the pressure is being released through it. The treatment is as follows: unscrew the filter, clamp the hole where the oil comes from with your finger, turn the engine with the starter - the oil flows through the valve, flushing it.

You unscrew the oil filter. There will be two holes underneath it. Central threaded - for supplying oil to the system. The second, as far as I remember from below, is the oil supply from the pump. This is where you need to squeeze it. You just need to take into account that the pressure can be several atmospheres and you cannot turn the engine for a long time, since oil is not supplied to the system.

Oil pressure sensor VAZ 2107, connection diagram

On a VAZ 2107 car produced in 1988, one standard emergency oil pressure sensor is installed, which is connected to an emergency pressure lamp in the instrument panel.

Previously, it was paired with an oil pressure indicator sensor and a dial indicator in the instrument panel.

Connection diagram for the VAZ 2107 engine oil pressure sensor (after 1988 onwards)

Connection diagram for the oil pressure sensor in the engine lubrication system of a VAZ 2107 car

Description of the connection diagram for the VAZ 2107 oil pressure sensor

The emergency oil pressure sensor is installed in the open circuit of the connection of the oil pressure warning lamp in the panel on the vehicle's instrument panel. Namely, the “masses”. When the ignition is turned on, there is no pressure in the engine lubrication system, the moving contact of the sensor is pressed, the circuit is closed, the emergency oil pressure warning lamp in the instrument panel is on. After starting the engine, the pressure in the lubrication system increases, the contact inside the sensor moves under the influence of pressure, opening the circuit, and the light goes out.

Notes and additions

On VAZ 2107 cars, the emergency oil pressure sensor MM-120 and its modifications are used: 2101-3810600, 2101-3829010, 2101-9829010-01, 2101-9829010-02.

Installation

Installation of the sensor is carried out in reverse order.

The performance of the engine of any car depends on the presence of engine lubrication and the pressure created by the oil pump. So that the driver can control these important parameters, a corresponding indicator and an emergency lamp flashing red are installed on the instrument panel of the “classic” VAZ 2106. Both indicators receive information from one element built into the engine - the oil pressure sensor. The part is simple and can be easily changed with your own hands if necessary.

Replacing the oil sensor on a VAZ 2107 with your own hands

Replacement: oil pressure sensor VAZ 2107

As sad as it is to admit, any component of a car can fail, and this happens at the most inopportune moment. In this regard, control and measuring devices are no exception. The reasons for this may be different:

• Violation of operating conditions prescribed by the manufacturer.
• Temperature violation.
• Elementary mechanical damage to the sensor.

In general, these reasons are enough, but the result is the same. Considering that control and measuring devices cannot be repaired, they must be replaced if necessary. In this step-by-step guide for car enthusiasts, it will be described and demonstrated, based on a VAZ 2107 car, replacing the oil pressure sensor.

How to change DDM

To replace the sensor, you only need a 19-size open-end wrench for classic VAZ cars and a 21-size for front-wheel drive cars. On foreign cars, the location of the sensor and the size of the key may differ, so carefully read the repair and operating instructions for your car. Carry out the replacement with a cold, switched off engine.

The replacement itself is not difficult even for an inexperienced driver. The step-by-step replacement procedure is described below.

1. Remove the wire terminal from the sensor terminal and move the wire to the side so that it does not interfere.
2. Use a wrench to unscrew the sensor.
3. Get him out.
4. Inspect the area around the sensor for oil leaks. If found, replace the aluminum or copper O-ring.
5. Place the old or new O-ring on the new sensor and screw it into the seat (if you bought a sensor with an O-ring on it, do not use the old one, even if it did not leak). Do not overdo it, the maximum effort should not exceed 1-1.5 kilograms.
6. Connect the wire terminal to the sensor terminal.

7. If, after turning on and warming up the engine, the oil sensor begins to leak, install a new O-ring and check its threads. You may have screwed it in the wrong way.

WHY IS THIS SENSOR NEEDED?

The main technological function of this device, naturally, is to monitor the oil pressure in the engine oil lubrication system. The data that this sensor transmits to the oil pressure indicator is very important for the driver. Using them, the driver determines how correctly the car’s engine is working and, if necessary, makes a specific decision.

Attention: When the oil pressure drops to a critical level, you must stop the machine and turn off the engine. It is possible that there was an oil leak from the engine lubrication system. If there is significant loss of lubricant, the engine may seize.

However, it is also possible that the oil pressure sensor has simply failed. The absence of obvious mechanical damage on the surface of the sensor in no way indicates its serviceability. The defect can be not only mechanical, but also technological in nature. In this case, in relation to the proposed option, it is assumed that the VAZ 2107 oil pressure sensor will be replaced.

How to properly check the performance of the oil pressure sensor

If a light on the instrument panel indicates a decrease in pressure in the engine lubrication system, then in this case it would be rational to check the functionality of the sensor. Checking the functionality of the sensor is carried out using a pressure gauge. But before checking the sensor, it is necessary to check the oil level in the system and the integrity of the power supply wiring to the oil pressure sensor using a dipstick. If there are no comments on these two items, then you can start checking the sensor. To do this you need:

• Unscrew the oil pressure sensor.
• Install a pressure gauge in its place.
• Start the car engine.
• Check the pressure gauge readings.

If the pressure gauge shows pressure in the lubrication system of at least 0.35 kgf/cm2, this means that the system is working normally and the sensor is faulty. However, a pressure gauge may not always be at hand. In this case, you need to do the following. You need to unscrew the pressure sensor and turn on the starter for a short time (see Repairing the VAZ 2107 starter - instructions), but there is no need to start the engine. If splashes of lubricant fly out of the mounting hole, this means that the movement of lubricant in the system is normal and the reason for the warning lamp to turn on is the same faulty sensor. Consequently, it is necessary to purchase a new sensor from a retail network, by the way, the price for it is low, and replace it.

Pointer functions and operation

The purpose of the device, built into the dashboard to the left of the tachometer, is to display the engine oil pressure level, guided by the sensor. The principle of operation of the pointer resembles the operation of a conventional ammeter, which responds to changes in current strength in the circuit. When the mechanical rheostat inside the measuring element changes resistance, the current increases or decreases, deflecting the needle. The scale is graduated in pressure units corresponding to 1 Bar (1 kgf/cm2).

The device consists of the following main elements:

• round body;
• pointer mechanism with permanent magnet and windings;
• a control light connected to the corresponding sensor by a separate line;
• scale with backlight;
• compensation resistor;
• connecting wires with connector.

Zero readings of the device correspond to a circuit resistance of 320 Ohms. When it drops to 100-130 Ohms, the needle stays at 4 Bar, 60-80 Ohms - 6 Bar.

The Zhiguli engine lubrication pressure indicator is a fairly reliable element that breaks very rarely. If the arrow does not want to leave the zero mark, then the culprit is usually the sensor. When you doubt the functionality of the indicating device, check it using a simple method: measure the voltage at the connection contacts of the MM393A oil sensor with the engine running. If voltage is present and the needle is at zero, the device should be changed.

The VAZ 2106 oil pressure monitoring system with two sensors and a mechanical indicator is simple and reliable in operation. Despite the outdated design, car enthusiasts often buy and install these meters on other, more modern cars, equipped from the factory with only a control indicator. Examples are the updated VAZ Seven, Chevrolet Aveo and Niva.

For any modern car, the source of stable and proper operation is the engine. It is this node that is otherwise called the “heart of the machine.” For the operation of the power unit, a lubricant is required - oil, which ensures the sliding of parts without their deformation and friction against each other. In this regard, the VAZ-2107, like any modern vehicle, has a sensor that is responsible for the oil pressure in the system.

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The oil pressure sensor on the VAZ-2107 is available on any engine, regardless of the injector or carburetor. It can be found in the lower left side of the engine, near the gearbox and steering column. On some more modern cars of this model, the DDM is located on the end side of the cylinder head, not far from the left timing shaft bearing.

The sensor is available in two varieties: electronic and mechanical. The electronic sensor turns on a light signal when the oil pressure decreases. Mechanical DDM determines not only the pressure value, but also allows you to control it.

The information is sent to the control lamp and if a problem occurs in the engine - a decrease or sharp increase in fluid pressure, a corresponding indicator appears on the dashboard. If the light comes on too often, this may indicate a malfunction in the oil supply or a breakdown of the sensor itself.

It is thanks to this device that the driver can understand how efficiently the engine operates. The oil pressure sensor may become faulty for the following reasons:

• oxidation of contacts;
• presence of blockage at the inlet of the DDM;