Priora oil pressure sensor

The most important role in the design of automobile engines is played by the oil system, which is assigned many tasks: to reduce the frictional resistance of parts, remove heat and remove contaminants. The presence of oil in the engine is controlled by a special device - an oil pressure sensor. Such an element is also present in the design of VAZ-2170 or Lada Priora cars. Very often, car owners complain about problems with this sensor, which has a small resource, and if it fails, it must be replaced. And that is why we will pay special attention to such a device and find out where this item is located in Prior, how it works, the symptoms of its malfunction and the features of self-checking.

Oil pressure sensor on Priore: purpose of the device

The correct name of the device is an oil pressure drop alarm sensor, which plays a very important role in the design of an automobile engine. To understand its purpose, you need to know the following:

1. The oil in the engine system provides lubrication to all moving and rubbing parts. Moreover, these are not only elements of the CPG (cylinder-piston group), but also the gas distribution mechanism. In the event of a decrease in oil pressure in the system, which occurs when it leaks or leaks, the parts will not be lubricated, which will lead to their accelerated overheating and, as a result, failure.
2. Engine oil is also a coolant that removes heat from hot parts to prevent overheating. The oil circulates through the engine system, due to which the heat exchange process takes place.
3. Another important purpose of the oil is to remove contaminants in the form of metal dust and chips formed during the friction of parts. These contaminants, together with the oil, drain into the crankcase and are collected on the filter.

To control the oil level in the engine, a special dipstick is provided. With it, the driver can determine if everything is in order with the lubrication system. And if a low amount of oil is found on the dipstick, you should immediately add it to the optimum level and look for the reason for its decrease.

Checking the oil level in a car engine is extremely rare, and even more so, it is impossible to detect a reduced amount of oil while driving. Especially for such purposes, an indication in the form of a red oiler is provided on the instrument panel. Illuminates after the ignition is turned on. When the engine is started, when there is sufficient oil pressure in the system, the indication goes out. If the oiler turns on while driving, you must immediately stop and turn off the engine, thereby eliminating the possibility of overheating and jamming.

A decrease in oil pressure in the system can occur for one of the following main reasons:

• the oil level in the system has fallen below the minimum;
• the oil pressure sensor has failed;
• the cable connecting the sensor is damaged;
• dirty oil filter;
• failure of the oil pump.

In any case, you can continue to drive a car only after the cause of the breakdown has been eliminated. And in this article we will consider one of the main reasons why the oiler on the Priora lights up - the failure of the oil pressure sensor.

Varieties of oil pressure sensors

Priora uses an electronic oil pressure sensor, also called an emergency. It monitors the oil pressure in the system and, if it decreases, gives a signal to the instrument panel, as a result of which the indication in the form of an oiler lights up. These sensors are used in all vehicles and are mandatory.

They are no longer found on modern cars, but in the first versions of VAZ cars, mechanical sensors were used that displayed the pressure value using a pointer. This allowed the driver to determine if everything was in order with the lubrication system of his engine.

It is interesting! Some car owners resort to installing a pressure gauge in the cabin to monitor the condition of the oil pump and lubrication system. This is implemented by installing a splitter in the hole where the pressure sensor is located, with which you can connect the sensor to the signal lamp, and the hose to the pointer.

The principle of operation of the electronic oil sensor on the Priore

It is necessary to know the principle of operation of such a device in order to be able to verify its serviceability. The device works quite simply. To do this, its design has 4 membranes (figure below), which are connected to 3 contacts.

The principle of operation of the pressure sensor on the Priore

Now directly about the principle of operation of the sensor:

1. When the driver turns on the ignition, the oil pump does not build up oil pressure, so the oiler light on the ECU comes on. This happens due to the fact that contacts 3 are closed and power is supplied to the signal lamp.
2. When the engine is started, the oil through the sensor channel acts on the membrane and pushes it up, opening the contacts and breaking the circuit. The light goes out and the driver can be sure that everything is in order with his lubrication system.
3. The indicator on the instrument panel may come on with the engine running in the following cases: if the pressure in the system drops (due to both low oil level and due to the oil pump) or due to sensor failure (diaphragm jamming), which is not disconnect contacts).

Due to the simple principle of operation of the device, these products are quite reliable. However, its service life also depends on the quality, which is often not satisfied with Priora oil pressure sensors.

Signs of a malfunction of the oil pressure sensor on the Priore and methods for checking for serviceability

A characteristic sign of a malfunction of the device is the glow of the indication in the form of oil on the instrument panel when the engine is running. Also, an intermittent glow of the indicator may occur at high crankshaft speeds (over 2000 rpm), which also indicates a malfunction of the product. If you check with a dipstick that the oil level is normal, most likely the DDM (oil pressure sensor) has failed. However, this can only be verified after verification.

You can check and make sure that the cause of the glow of the oiler on the instrument panel is DDM, you can use your own verification manipulations. The easiest way to check is to install a known-good sensor instead of a normal product. And although it is cheap, few people are in a hurry to buy it, and in vain, because DDM on Prior is one of the many car diseases.

To check the health of the oil sensor on the Priore, it is necessary to disassemble it from the car. Here's how to do it and where it is located. After removing the product, you need to assemble the circuit, as shown in the photo below.

Compressed air from the compressor must be supplied from the side of the thread to the hole. At the same time, the lamp should go out, indicating that the membrane is working. If the lamp does not light up when assembling the circuit, this may indicate that the membrane is stuck in the open position. You can verify this by testing the product with a multimeter.

Where is the oil pressure sensor located on the Priore

In order to check the DDM on the Priore or replace it, you need to find out its location. On the Priora, between the air filter housing and the oil filler cap, there is an oil pressure sensor. The photo below shows where the device is located in Priore nearby.

And its location is very far away.

It is located in an open area, and access to it is unlimited, which has a positive effect on the process of removal, inspection and replacement.

Which sensor to put on Priora so that there are no problems

It should be noted right away that Priora produces oil pressure sensors of the original sample, which have the article: Lada 11180-3829010-81, as well as products from Pekar 11183829010 and SOATE 011183829010. Their price ranges from 150 to 400 rubles (in the original it naturally costs from 300 to 400 rubles). On sale, products of the manufacturer Pekar and SOATE (Chinese production) are more common. Original and Chinese sensors differ in design and have the following characteristics:

1. Sensors with a short plastic part are updated models from Pekar and SOATE.
2. With an extended part - original LADA products, which are installed on 16-valve engines of the brand 21126 (other engine models are possible).

The photo below shows both samples.

Now the main thing is which sensors to choose in Priora? Everything is simple here. If you had a sensor with a long top, then this is exactly what you need to install. If you put it with a shortened "head", it will not work properly, which is due to the design of the membrane. If the car is equipped with an updated version of the factory sensor, that is, with a shortened part, then it can be replaced with a similar or original LADA, which will last at least 100 km.

It is interesting! The plastic top of the product can be painted both white and black, but this does not affect the quality. Although many sources claim that the old and new sensors are interchangeable, this is not the case, so before buying a new item, check what type of device is used in your car, which depends on the type of engine. Short section products are not suitable for engines factory fitted with long top units.

In addition to the sensor manufacturers mentioned above, you should also pay attention to Autoelectric brand products.

Features of replacing the oil sensor on Priore

The principle of operation for replacing DDM in Prior is quite simple and does not require explanation. However, it is important to consider some recommendations in order to carry out the procedure correctly. To do this, consider the step-by-step process of removing and replacing the oil sensor on the Priore:

1. It is important to know that to replace the DDM, you do not need to drain the oil from the system. When unscrewing the product, oil will not flow out of the mounting hole in the cylinder head housing. Let's get to work.
2. Remove the plastic cover from the engine.
3. Having gained access to the device, it is necessary to disconnect the chip with the cable. To do this, squeeze it with two fingers and pull it towards you.
4. Next, you need to unscrew the product with a key to "21". If you're using a regular open end wrench, you'll need to remove the air filter housing so it's out of the way. If a suitable head length is used, it is not necessary to remove the filter housing.
5. Screw the new sensor into place of the disassembled product (do not forget to check the removed device). In addition, it must be tightened with a torque of 10-15 Nm according to the instructions. When installing, be sure to install the sealing washer or ring, which must be sold with the product.
6. After screwing in, do not forget to install the chip and check the correct operation of the product.

Detailed replacement process in the next video.

Summing up, it is necessary to emphasize once again the importance of the considered sensor. You should pay attention not only to when it lights up when the engine is running, but also to when the "oiler" indicator does not light up when the ignition is turned on. This also indicates a sensor failure or possible cable damage. Correct the problem so that in the event of a drop in oil pressure in the system, the sensor sends an appropriate signal to the dashboard. With the help of this expert instruction, you will take care of replacing the emergency oil pressure sensor yourself, and you will also be able to check its operation.