Almost all systems in the car are connected to various signaling devices in order to control their operation. If the warning lamp on your control panel lights up, it is likely that the emergency oil pressure sensor has worked.

What is this alarm for?

The oil pressure sensor is one of the main parts of the engine control system in Lada Kalina, Gazelle, Kamaz, UAZ and others. This signaling device belongs to the oil supply control system, which is one of the first to respond to malfunctions in the machine's engine.

Photo - Volga oil pressure sensor

There are two types of car sensors:

1. Emergency;
2. Control (optional).

The emergency sensor is in all cars (Daewoo, Ford, Nexia, Opel, Toyota, GAZ, UMZ, Lada Priora, ZMZ, Iveco, Dodge). It reacts at the slightest change in pressure and immediately notifies you with a light signal on the dashboard. The control sensor is not installed in all vehicles, it, in turn, transmits any pressure readings to the arrow screen on the instrument panel. Such a device is equipped with AZLK, Volga, Volkswagen Golf 4, Mazda, Hover.

Photo - additional oil pressure sensor

Principle of operation

The emergency auto-device, like the Ford Focus and Transit, Nexia or Opel Corsa cars, works using a membrane mechanism. Inside the sensor there is a special membrane that reacts to the smallest changes in the oil level. When the engine is first turned on, there is no oil pressure in the system, and the detector's contact terminals are in a closed state. A lamp on the dashboard lights up, indicating that the system is working and ready for operation. When the engine starts and warms up, the oil pressure increases, the fluid acts on the membrane, and it turns off the lamp.

Photo - the principle of operation of the oil pressure sensor

But as soon as the oil pressure begins to fall below the required level, the membrane again becomes in an even position, and the contacts close, ensuring that the lamp turns on. If during operation of the car, the indicator on the instrument panel is on, this indicates that the pressure is very low.

The control sensor is arranged a little differently. It is equipped with a slider, which is connected to the plate with a special thread. A wire is connected to the slider, which is connected to the oil pressure control membrane. As soon as the oil level drops or rises, the membrane changes its position and the arrow on the dial monitor moves with the help of a mechanism. This device is used to monitor the level drop in this moment, often it is not equipped with a signal lamp.

Photo - oil pressure sensor design

Video: BMW M30 emergency oil pressure check

Check and repair

If you need to check the device, then take a small piece of rubber hose. On the one hand, a special adapter is attached to it, which corresponds to the diameter of the pump outlet, and on the other hand, an emergency engine oil pressure sensor. We begin with the help of a pump to create artificial pressure. Be sure to record these pressure/resistance ratios. If the readings of the sensor and its characteristics match, then the device is working.

There is another way to check the sensor. You need to put it in a foamy solution, with plenty of soap. Hold the sensor there for a bit. Take it out and connect it to the pump. Inflate with pumping unit pressure in the device. If bubbles come out of the folded joints, the device is unusable and leaks oil.

But if you are convinced of the malfunction, you must replace the detector. The emergency oil pressure sensor for an eight-valve engine is located on the right side of the motor, and for a sixteen-valve engine it is on the left. Its location may vary depending on the make and model of the vehicle. To remove it, use our instruction:

1. Disconnect the wire going to the dashboard from the sensor;
2. There is a thread under the sensor, so carefully unscrew it wrench. If it is torn off, then try to remove it with pliers;
3. After that, you just need to remove the sensor from the hole.

Inspect the aluminum O-ring immediately. This is what causes the oil to leak. Depending on the diagnostic results, you will need to buy or new sensor or replace the seal. The process of installing a new appliance is the opposite of removing it. Be sure to check the tightness of the connection between the warning lamp and the oil alarm sensor. In this case, the method of removal and connection largely depends on what brand the signaling device has and the model of the car.

Photo - replacement of the emergency oil pressure sensor

Sometimes the problem may lie in the way the sensor is installed. So, for example, Landcruiser Diesel is known for the fact that there the device can “fall” into the pan, which is why it gives incorrect readings. Sometimes the circuit oxidized or the computer control wire of the detector simply broke. Also, if the sensor is crooked, then it may incorrectly measure the pressure level due to membrane deformation.

The price of the sensor varies from several hundred for a used one to several thousand rubles (for example, for exclusive devices). It is advisable to consult with the seller before buying the device, because it is very important that it suits your car.

The question is how to check oil pressure sensor(hereinafter DDM) is of interest to drivers who have encountered problems in the operation of the engine oil system, in particular when. You can check this assembly using an electronic or arrow multimeter, a control light or a working pressure gauge. The verification procedure is simple, and even a novice motorist can do it. The following are detailed algorithms checks with indication of subtleties and nuances.

The principle of operation of the oil pressure sensor

Before you figure out how you can check the DDM, you need to briefly dwell on the theory, in particular, how the oil pressure sensor works. This will give a complete understanding of the process. First of all, it must be pointed out that there are two types of oil pressure sensors - mechanical (installed on old cars, in particular, Soviet models) and electronic (more modern, widely used in the automotive industry).

Design of mechanical sensors

Mechanical DDM device

Inside the mechanical sensor there is a membrane that changes its shape depending on the pressure applied to it. Accordingly, the larger it is, the more the membrane bends. Bending, it acts on the rod in the design, which is responsible for compressing the liquid in a special sealed tube. At the other end of this tube is a rod on which this liquid pressed, and now the second rod moved the arrow of the device - a differential pressure gauge, or just a pressure gauge. The pressure is rising - arrow goes up, the pressure drops - the arrow goes down.

There is also another, more common mechanical oil pressure sensor device. It is similar, but with the addition of a variable resistor - a rheostat. So, a resistor is placed on the membrane in its design, which changes its resistance depending on, in fact, the value of the applied efforts. Accordingly, the greater the deformation of the membrane, the greater the change in the resistance of the sensor. In the absence of membrane deformation, the resistance value will be zero. This change is fixed by the electronic engine control unit (ECU), to which the corresponding signal is given. His software created in such a way that it controls the presence of the signal from the DDM in a certain interval corresponding to the normal operating oil pressure in the engine oil system. As a rule, dial gauges are attached to mechanical sensors, on the scale of which the absolute value of the oil is shown. Although in fact these devices are voltmeters, the arrow of which changes its position in accordance with the resistance value coming to the device from the DDM.

Design of the electronic sensor

Electric DDM device. 1 - rod, 2 - signal lamp, 3 - contacts, 4 - membrane

The design of the electronic oil pressure sensor (by the way, it is installed on VAZ-2114 cars and its analogues, the new Lada models) implies that with a flat membrane (not under pressure), the signal lamp supply circuit on the instrument panel is normally closed, so it turns on under the appropriate conditions. However, when the diaphragm flexes under the action of oil pressure, it mechanically opens the circuit with its rod and the signal lamp goes out. This, in fact, happens when the engine is started, which can be judged by the fact that the oiler lamp with the ignition on, as well as the first 1 ... 2 seconds, is in the active state (lights up).

Thus, the essence of checking a modern DDM is to measure the resistance of the sensor winding with a multimeter switched to the mode of measuring electrical resistance (ohmmeter). However, it can also be tested in other ways.

Sensor Diagnostics

As mentioned above, there are two types of pressure sensors - mechanical and electronic. Accordingly, the procedures for checking the emergency oil pressure sensor in both cases will differ, albeit slightly (there are only design features sensor data). First of all, you need to make sure that it is the oil pressure sensor that is faulty. To do this, you will need to perform additional diagnostics of the oil system - check the oil level in it, the condition of the filter, pump, and so on. If suspicions fell precisely on the serviceability of the oil pressure sensor, then first of all it is necessary to dismantle it from the seat with the engine turned off (as a rule, it is located in the area of ​​\u200b\u200bthe oil filter).

Keys are usually used for this. various diameters, for example, by 24, 27 or others (depending on the specific car model). Thereafter don't forget to shut it up seat rags so that when the engine is running, oil does not flow out of it, and various debris or small parts (bolts, nuts, etc.) do not get into the oil system!

It is also advisable to check the pressure in the oil system of the car. To do this, you need to screw a pressure gauge into the seat from where the DDM was unscrewed, with the help of which make a control measurement of the oil pressure at various engine speeds. Please note that in this case it is necessary to ensure maximum tightness so that the pressure gauge readings are extremely accurate. Be sure to look at the pressure when the engine is running at idling as well as medium and high.

For different machines, the value of the corresponding pressure will be different, so you will find the exact information in the manual or technical documentation for a particular machine. If the pressure value is normal, but the information does not reach the computer, then the sensor is most likely to blame, so it needs to be checked.

Checking the electric oil pressure sensor

Checking the sensor with a multimeter

Electronic oil pressure sensors used both on foreign cars and domestic cars, in particular, on VAZ-2114 and other modern Ladakh cars, are easy to check. Their device is similar to that where a rheostat is used, however, they simply open the circuit at a certain pressure. Accordingly, its verification is even easier. For this you need:

• Set the multimeter to the "continuity" (break) mode of the electrical circuit.
• Ensure a tight connection between the air pump and the inlet (sensitive) hole where air is supplied. Here, similarly, it is necessary to ensure high-quality sealing, since the result of the experiment directly depends on this.
• Install one multimeter probe on the central output contact of the sensor, and the second on its body, "ground".
• At the same time, apply an air pressure of about 1 ... 1.5 atmospheres to the sensor using a pump. It is not necessary to blow strongly, so as not to damage the membrane. If the sensor is in good condition, then the electrical circuit will open almost immediately, under the mechanical action of the rod, which is in rigid connection with the flexible sensitive membrane of the oil pressure sensor.

As is clear from the diagram of the sensor, if the circuit is open (fixed by a multimeter), then the sensor is working. Otherwise, no. In rare cases, instead of a sensor, the problem of why the oil light is on must be sought in faulty (broken or damaged insulation) wiring.

Also, the performance of the oil pressure sensor can be checked by another method. So, you need to remove the power wire from the sensor and short it to ground. If the sensor is working, then the signal light on the dashboard should not light up. Otherwise, the sensor is defective.

Checking two sensors

On some modern machines, two of the same type (“new”) pressure sensors are installed. The first is designed for an absolute pressure value in the range of about 0.15 ... 0.45 atmospheres, and is designed to open the control lamp after the engine is started. Its verification is similar, and corresponds to the procedure described above. That is, the connection is the same. Its circuit should open when pressure is built up in it in the specified range.

The second sensor is designed to monitor oil pressure on a running engine. It is similar in type to the first, but its difference lies in controlling the upper limit of the oil (in order to prevent it from increasing to critical). The upper value can be different, and differs for specific car models. However, in most cases it is about 1.8 atmospheres. When this pressure level is reached or higher, the contact circuit should be closed, and accordingly, the oil pressure warning lamp in the engine system should be activated on the instrument panel.

Checking the pressure sensor with a light bulb

To check an electric (new) oil pressure sensor, instead of a multimeter, you can use a light bulb designed to operate under a voltage of 12 V DC, as well as a power supply (battery) and a compressor (preferably with a pressure gauge). The verification algorithm is as follows:

Wiring diagram

• Two wires must be connected to the contacts of the light bulb.
• Connect one of the ends of the wire going to the bulb to the output contact of the pressure sensor.
• Connect the ground from the power supply unit (or minus from the battery), respectively, to the body (ground) of the sensor.
• Connect the plus from the power supply or battery to the other wire on the light bulb.
• If the sensor is working, then after turning on the power supply (or just when contact occurs from the battery), the light should light up. Otherwise, the sensor can immediately be considered faulty.
• Further, for verification, it is necessary to apply a pressure of about 0.5 atmospheres to the sensitive element of the sensor using a compressor or pump. The pressure value can be different, and it depends on what kind of pressure the sensor is designed for. Usually it is around the already mentioned 0.5 atmosphere.
• When the pressure rises to specified value(critical for the sensor), the light should go out, because this will open the control circuit in the sensor housing. If this does not happen, then the sensor can also be considered unusable.

Instead of a compressor, it is quite possible to get by with an ordinary automobile and even a bicycle pump, which will give out the necessary air pressure atmospheres without any problems.

Checking the mechanical sensor

Checking an old mechanical sensor (for example, installed on some VAZ "classic" models and old foreign cars, for example, "Volvo 240"), with which it is possible to directly find out what pressure is currently in the car's oil system, can be done even without multimeter, but with the use of additional instruments (air pump and electric car pressure gauge). Similarly, the sensor must be removed from the machine, since it will not work to check it directly on the engine.

Checking the sensor with a pressure gauge

Verification is a little more complicated than that of electronic ones, but this consists, first of all, in some difficulty in assembling an electrical circuit. You need to act according to the following algorithm:

How to check a mechanical sensor, wiring diagram

• On the sensor, you need to find a contact that gives a signal for an emergency oil pressure lamp on the dashboard of the car, as well as another contact, from where a signal is given to indicate oil pressure. "Mass" for further measurements will simply need to be taken from the sensor housing (in normal conditions all sensors take "mass" just from the engine housing).
• Similar to electronic pressure gauge you need to figure out where to connect the plus and minus of its power supply, as well as directly the signal from the sensor (that is, there are three contacts).
• To plug wiring diagram, and tightly connect the air hose connecting the pump and the sensing element of the sensor.
• Next, you need to apply 1 ... 2 atmospheres to the sensitive element of the sensor using a pump. If it is working, then the incoming pressure will be clearly shown on the dial gauge. If this does not happen, then the oil pressure sensor is faulty.

As a rule, oil pressure sensors cannot be repaired, so if their malfunction has been identified, then this assembly must be replaced. Fortunately, these elements are inexpensive and are available everywhere in almost any car shop.

Please note that when mounting the sensor on its seat after checking, it is recommended to lubricate it.

One head it's good, but two better

On numerous forums on the Internet, you can often find stories from experienced motorists that, together with an electronic oil pressure sensor, they installed a mechanical one in parallel with it. In particular, this is expressed in the fact that in the event of a drop in the oil pressure level, not only the corresponding control lamp on the dashboard lights up, but the absolute value of the pressure on the pressure gauge installed somewhere near the dashboard will also be visible.

This is done for the reason that sometimes, for example, after running on the engine overhaul or when using low-quality (or outdated) engine oil, which is clumped, the sensor element does not work properly, respectively. Accordingly, when the pressure drops, the control lamp does not light up, which is a critical fact, since the engine runs “dry” under such conditions, that is, without proper lubrication. This significantly reduces its resource and can completely disable the motor in the shortest possible time.

So, motorists install a so-called tee at the connection point of the pressure sensor, a traditional electronic sensor is connected to one output end of which, and a mechanical one to the other. The hose with wires is mounted in the engine compartment in accordance with the design of the engine. The main thing is that it does not interfere with other elements of the motor, and itself is not subjected to mechanical and significant thermal effects. A pressure gauge is installed at its end, for example, from a VAZ "classic", UAZ or other similar device. In fact, his model is not important, the main thing is that it is convenient to navigate on a scale, that is, it must have detailed graduation.

Conclusion

The pressure sensor is a fairly reliable unit, and rarely fails. Therefore, if problems arise with the oil system indication system, it is necessary to check other parameters - oil pressure, leaks, the condition of the oil itself, its level and the oil filter, and only after that check the condition of the oil pressure sensor. In general, checking the health of this node is not very difficult, and even novice motorists can do it, literally using Automobile compressor and multimeter. If the sensor is out of order, then it is hardly possible to repair it, so it is better to buy a new DDM in a car shop, since it is inexpensive.

Details

The emergency oil pressure system is a very important control system in a car. If this system does not work, then there is a high probability that if a malfunction occurs in the engine, spoil it. Therefore, you need to responsibly control the oil pressure. One of the units of control is self oil pressure sensor.

Fig 2 - Oil pressure control sensor.

As for the first, everything is quite simple there.

Figure 3 - Diaphragm inside the oil pressure sensor.

Inside the sensor is a membrane (Fig. 3) that is sensitive to oil pressure. When we turn on the ignition, there is no oil pressure in the system, contacts 3 inside the sensor are closed (Fig. 4a). Our electrical circuit is closed, therefore, the emergency oil pressure lamp is on, indicating that the control system is working. We start the engine, the oil pressure increases, acting on the membrane 4. The membrane deforms and pushes the pusher 1b, which breaks the contacts and the lamp goes out. If for some reason the pressure in the system drops to that for which the sensor is designed, then the membrane returns to its usual position and the pusher closes the contacts again. The lamp lights up, informing us of a drop in oil pressure in the system.

Fig 4 - Scheme of operation of the emergency oil pressure sensor.

For oil pressure sensor test we need a multimeter, a pump with a pressure gauge and the sensor itself. We put the multimeter on the continuity of the circuit. We stand with the ends of the device on the sensor. It should show zero resistance (short). Further, without removing the ends of the device from the sensor, we will make a pitch with a pump. At this moment, when we pump the pump, the chain should break and the device should show infinity. If, having done the previous procedure, you got the same result, then the sensor can be considered serviceable.

The second type of sensors is arranged as follows:

Fig 5 - Cross-sectional view of the oil pressure control sensor.

Inside there is a slider 2 (Fig. 5), which moves along the plate with the nichrome wire 1. And depending on the pressure, the resistance of the sensor changes. Under the action of oil pressure, the membrane 3 (Fig. 6) is deformed, moving the pusher 4, which in turn acts on the mechanism that changes the resistance 2. Given this resistance, the arrow on the device 1 shows us the corresponding pressure.

Fig 6 - Oil pressure control scheme.

If we want to make sure that our sensor is working within the required pressure limits, then we can do the following experiment:
• Take a small piece of hose desired diameter, on the one hand, you need to attach the same adapter as on the pump, on the other hand, we insert the sensor. If the hose is slightly larger in diameter, then it should be crimped on top with wire. The system must be sealed.
• We need a graph (or just a plate with control points), which should reflect at what pressure, what should be the resistance on the sensor. Such a schedule should be in the manual for your car.
• Next, take the spare tire and pump it up to the desired pressure. Here, of course, we will not be able to drive through all the control points, but we can draw some conclusions about the operation of the sensor.

If you are checking the performance of the sensor (removed from some used engine) before installing it on your car, then the sensor should also be checked for leaks. We dilute the soap solution. By pumping up pressure with a pump, we wet the rolled joints on the sensor with a solution. If the soap solution does not foam, then everything is in order, such a sensor can be safely put on the engine.

Most motorists for the first time about the concept " Oil pressure sensor"They find out after the engine oil pressure warning lamp lights up on their dashboard - it is this lamp that receives the signal from the engine oil pressure sensor. But where is the oil pressure sensor in the car located?

To search for an oil pressure sensor, in some cases it is necessary to disassemble quite a few nodes under the hood, although this is rare, since this device is in an accessible place. There are also not so many common places for different machines where the oil pressure sensor is located.

So, in most cases, the oil pressure sensor is located behind and slightly to the right of its center somewhere below - often not far from the oil filter. In some cases, to access this sensor, you will need to climb into the hood from above (through the hood cover) - this is where you have to remove the plastic engine cover or, possibly, a small number of other components. In other cases (more often on foreign cars), access to the oil pressure sensor is through the wheel arch (in the vast majority of cases, the right one), for which you need to remove the right wheel (less often, also remove the fender liner or plastic insulator).

This is what the oil pressure sensor looks like

Table with the locations of the oil pressure sensor on popular cars:

Automobile	Where is the oil pressure sensor	The most convenient access to the sensor
VAZ 2108/09/099 VAZ 2110/11 (8-valve engine)		Above.
VAZ 2110/11 (16-valve engine)	Left behind the engine on the camshaft block. A wire departs from the sensor, and next to it there are 2 bundles of wires in a black insulator.	Above.
Lada Kalina	Behind to the right of the engine in the nest of the main cylinder block, near the belt guard. One wire comes out of the sensor.	Above. Must be removed first plastic cover cylinder block.
Audi - most models	Close to the oil filter. There may be a second sensor - on the main cylinder block. Feature- one wire comes out of it.
Chevrolet Lanos	On the oil pump bottom of the engine. A characteristic feature is that a bundle of wires in an insulator departs from it.
Ford Transit	Under the front bumper oil cooler in the middle of the car on the engine.	From below (when the car is on a flyover or above a pit.
Mercedes-Benz - most models	On the crankcase, slightly to the right of the center of the car.	From below (when the car is on a flyover or above a pit.
Mitsubishi Lancer	Behind and slightly to the right of the engine (screwed into the engine) next to the oil filter. A characteristic feature is that one wire departs from it.	From below (when the car is on a flyover or above a pit.
Nissan X-Trail	On the bottom of the block next to the power steering pump.	By removing the right wheel and plastic belt guard.
Opel Astra	At the level of the crankcase on the right side of the generator. A characteristic feature is that one wire departs from it.	Removing the right wheel.
Volkswagen Golf Jetta	The emergency oil pressure sensor is located on the left end of the cylinder head. Another sensor - insufficient pressure oil - located on the oil filter to the right of the car.	top and bottom, respectively.
Volkswagen Passat	Two sensors: the first is located on the bracket before the oil filter, the second is at the outlet of the oil filter.
Gazelle (engine ZMZ-405)	Top right on the main cylinder block. A wire comes off the sensor.	Above.

In device vehicle the most important role engine plays. Romantic drivers call it "the heart of the car." But the power unit has one weakness- This is a lubrication system for rubbing parts. The only control body of this system is the oil pressure sensor (DDM), which can give the driver a lot of surprises.

Why you need an oil pressure sensor

DDM is essential component lubrication system of the propulsion unit. The device is responsible for monitoring the oil pressure that is supplied to the engine and, in case of any failures, transmits a signal to the driver's cabin - the corresponding light comes on.

To understand the meaning of the sensor in the design of the car, you will need to know how exactly the oil is supplied to the rubbing parts in the engine. Depending on the type of machine and its year of manufacture, lubrication can be different ways, including simple spraying. However, even this method involves required pressure so that the optimum amount of oil is supplied to the unit. If the amount of lubricant is stable, then the rubbing parts of the engine provide good trouble-free operation without rapid wear.

For the timely prevention of various negative factors in the lubrication system, DDM is installed, which is sensitive to all changes in the oil supply.

Signaling to the driver is carried out by sound and visual methods: a sharp squeak is heard in the cabin and a red indicator in the form of an oil can appears on the instrument panel. In some types of auto oil pressure characteristics are taken out in a separate pointer device, which shows the current state of the lubrication system.

Did you know that seat pressure can be affected by the vehicle's altitude relative to sea level?

Types of DDM and the principle of their work in modern cars

The modern automotive industry uses two types of such sensors. Each of the types works with certain types of engines and it is not acceptable to talk about which sensor is better / worse.

Mechanical sensor

The device most accurately determines the oil pressure in the system and transmits the readings to the scale in the dashboard.

The mechanical device has a complicated design: a body cup, a membrane, a pusher, a slider and a winding with nichrome wire. Due to the use of many components, mechanical sensors are expensive.

The operation of such a device is as follows: the slider, which is located on a platform with a nichrome winding, taking on the force of oil pressure, rises or falls. Each of his movements is transmitted to the pointer in the car, so that the driver will always be accurately informed about the pressure of the lubricant in the engine. The slider receives data from the effect of oil on the sensor membrane.

Electronic sensor

This type of sensor is simpler, but it cannot transmit all changes in the lubrication system to the driver. As a rule, the electronic type of the device shows only two main values: normal pressure and critical.

Thus, its sole purpose is to communicate to the driver that the pressure in the system is zero. To do this, its design uses only a body cup, a membrane, a pusher and a system of contacts with an oil pressure light in the passenger compartment.

Accordingly, if the pressure disappears, the membrane straightens out, since nothing presses on it. The pusher immediately moves inside the housing, the contacts close - an alarm signal is sent to the passenger compartment.

On some vehicle models, two types of sensors are installed at once. This expands the driver's ability to constantly monitor the engine lubrication system. In the event of a failure of one device, you can focus on the readings of the second.

Location of the device in different types of cars

Depending on the make and model of the vehicle, the location of the sensor may also vary. Each automaker has its own approach to combining engine compartment mechanisms.

Most often, DDM is located in close proximity to the cylinder head and oil filter. In some cases, to get to the device, you just need to open the hood and get to the sensor without dismantling other elements. In other situations, the sensor can only be removed from below, through the wheelbase.

Normal location - near the engine

Table: where are the oil pressure sensors on popular car models

Automobile	Where is the oil pressure sensor	The most convenient access to the sensor
VAZ 2108/09/099 VAZ 2110/11 (8-valve engine)		Above
VAZ 2110/11 (16-valve engine)	Left behind the engine on the camshaft block. A wire departs from the sensor, and next to it there are 2 bundles of wires in a black insulator.	Above
Lada Kalina	Behind to the right of the engine in the nest of the main cylinder block, near the belt guard. One wire comes out of the sensor.	Above. You must first remove the plastic cover of the cylinder block.
Audi - most models	Close to the oil filter. There may be a second sensor - on the main cylinder block. A characteristic feature is that one wire departs from it.	Above
Chevrolet Lanos	On the oil pump underneath the engine. A characteristic feature is that a bundle of wires in an insulator departs from it.
Ford Transit	Under the front bumper near the oil cooler in the middle of the car on the engine.	From below (when the car is on a flyover or above a pit).
Mercedes-Benz - most models	On the crankcase, slightly to the right of the center of the car.	From below (when the car is on a flyover or above a pit).
Mitsubishi Lancer	Behind and slightly to the right of the engine (screwed into the engine) next to the oil filter. A characteristic feature is that one wire departs from it.	From below (when the car is on a flyover or above a pit).
Nissan X-Trail	On the bottom of the block next to the power steering pump.	By removing the right wheel and plastic belt guard.
Opel Astra	At the level of the crankcase on the right side of the generator. A characteristic feature is that one wire departs from it.	Removing the right wheel.
Volkswagen Golf Jetta	The emergency oil pressure sensor is located on the left end of the cylinder head. Another sensor - insufficient pressure - is located on the oil filter to the right of the car.	top and bottom, respectively.
Volkswagen Passat	Two sensors: the first is located on the bracket before the oil filter, the second is at the outlet of the oil filter.
Gazelle (engine ZMZ-405)	Top right on the main cylinder block. A wire comes off the sensor.	Above.

Causes and symptoms of a malfunction

The driver of any vehicle should be aware that most often malfunctions in the lubrication system do not present any particular difficulties in their elimination. However, such breakdowns may also occur that will require the intervention of a service station specialist and narrow-profile equipment.

Signs of a malfunction in the oil pressure sensor can be:

loss of power by the car during acceleration;

instability of the ignition lock;

sharp jolts when driving at low speeds;

inability to start the car.

The reasons why the DDM fails include:

exhausted resource of the device;

membrane deformation;

short circuit in the wiring;

failure of the sensor relay.

Therefore, it is required to be as attentive as possible to such a device as DDM, since the state of the engine depends on its performance. If the sensor starts to "lie" and "get confused in the readings", the rubbing parts of the power unit will wear out very quickly, which will eventually lead to engine jamming.

How to connect a remote

In some cases, vigilant and experienced motorists connect an external oil pressure sensor to their car. This is the measure that will reliable control above the engine lubrication system. On the one hand, the functions of the sensor will be provided on a regular basis, and on the other hand, it will be possible to look at the pressure force in the system at any time.

Remote device connection procedure:

Open the hood.

Install a tee (adapter) in place of the oil pressure sensor.

The sensor itself and the alarm device are connected to the connectors of the adapter.

The wire from the device is pulled into the cabin.

The color of the wires is used to connect to the instrument panel.

Thus, without much difficulty, you can install and connect an additional oil pressure control device.

Thanks to a clear scale of divisions, the driver will always know the exact pressure in the system

How to replace

Replacing the DDM in the event of a breakdown is a necessary operation. Without this device, further operation of the car is impossible or unsafe.. In addition, almost any driver will be able to change the sensor on their own.

You will need to securely tighten the new sensor, and then check the connection for a leak

Video: do-it-yourself DDM replacement

Thus, even as an inexperienced driver, you can both check and replace the oil pressure sensor on any machine. The main thing is not to be afraid of difficulties and act carefully so as not to damage the devices adjacent to the sensor, hoses and wires.