Where is the VAZ 2109 oil pressure sensor located and its malfunctions

Where is the oil pressure sensor located on the VAZ 2109 carburetor?

All owners of the VAZ-2109 must monitor the oil pressure so that the internal combustion engine operates normally. DDM is a device that monitors the oil level in the engine. When there is no oil pressure, the red indicator light, which is located inside the car on the instrument brush, lights up. Where is such a sensor located? Its place is in the engine compartment of the engine. Engine lubrication and pressure sensor do not depend on whether a carburetor or an injector is installed in the engine.

Where is the oil pressure sensor located on the VAZ 2109 carburetor?

Oil pressure sensor VAZ 2109

Every modern car, including the VAZ 2109, is equipped with a variety of sensors and devices, each of which plays its own important role. One such device is the oil pressure sensor. It is located in the engine compartment. Regardless of which engine the car is equipped with, an injector or a carburetor, the sensor is located on top of the cylinder block on the intake manifold side.

A protective cover is installed on top of the oil pressure sensor. To ensure stable operation of the engine and the entire machine as a whole, it is necessary to ensure that the sensor is working properly. An oil filter is located next to the sensor.

Does the VAZ-2109 oil pressure sensor work?

To determine if it is correct, you need to check the engine oil level. To do this, you need to open the hood and pull out the dipstick. In order to check more accurately, you need to do this:

drive into a pit and remove the protection;
get close to the sensor;
turn on the ignition;
disconnect the power cord;
Use a voltmeter to measure the voltage between the block and ground. It should show 12 volts.

If there is no voltage, then there may be a problem in the contact or a broken wire.

Sensor design and operating pressure check

To determine whether a device is functional, you need to understand how it works. It is also useful to know how the controller and the VAZ engine, or rather its lubrication system, interact with each other. The sensor is mounted on the cylinder head on the side on which the carburetor is located. Next to the controller there is a VAZ oil filter.

The design of the oil pressure controller is very simple. It consists of a housing, a built-in control and measuring elastic membrane and a transmission mechanism. The principle of operation of the device in question is also quite simple. Engine oil for VAZ, located in the lubrication system, acts on the membrane during engine operation.

The latter is deformed by an amount corresponding to the oil pressure. Vibrations of the elastic “partition”, which make or break the contacts of the electrical circuit, are transmitted to the rheostat through the mechanism mentioned above. In turn, changing the resistance of the rheostat affects the indicator readings on the car’s dashboard.

Checking the operating oil pressure using the crankshaft is used, as a rule, in cases where the indicator begins to signal a drop in pressure in the lubrication system away from the service station, and the driver does not have a pressure gauge at hand.

Before checking, you must make sure that the oil level in the system and the corresponding VAZ 2109 filter are in order. If the level is insufficient, the oil will have to be filled to the nominal level. Then you can proceed directly to checking the health of the sensor. For this purpose, it is unscrewed from the socket.

With the lubrication system open, the crankshaft of the machine is turned manually (without turning on the engine). If at the same time the hole into which the oil pressure controller was screwed begins to fill, then the pressure is normal. The indicator that continues to light indicates that the sensor has failed.

In this case, the device should be carefully inspected for defects. If there is no damage, it must be washed with gasoline (diesel) and installed in its original place. If the light continues to light after this, the sensor will have to be replaced.

To determine if it is correct, you need to check the engine oil level. To do this, you need to open the hood and pull out the dipstick. In order to check more accurately, you need to do this:

drive into a pit and remove the protection;
get close to the sensor;
turn on the ignition;
disconnect the power cord;
Use a voltmeter to measure the voltage between the block and ground. It should show 12 volts.

If there is no voltage, then there may be a problem in the contact or a broken wire.

VAZ-2109 owners check the sensor in different ways:

First.
Remove the DDM located above the oil filter, turn the starter, the engine cannot be started during such a check. If all is well, oil should flow out. Then visually check the condition of the sensor. If there is no damage, then wash it with gasoline. They are installed in place. The light will go off. If it continues to burn, then it needs to be changed. Second. Check the oil level. If it’s low, add lubricant, then check again whether the light is on or not. Next, warm up the engine and then turn it off. Then connect to a pressure gauge. This adapter from the pressure gauge is screwed into place of the sensor and grounded through the ground of the car. Connect the signal LED to the battery positive and the sensor, start the engine and step on the gas. When the pressure gauge reads 1.2-1.6 bar, the LED goes out. If it lights up, then the DDM is broken.

The car owner must always monitor the condition of the DDM. After all, he also has problems. And these problems can affect the technical condition of the machine. You should not allow breakdowns, because if the engine jams, this will lead to large financial expenses.

Replacing the oil pressure sensor VAZ 2109

The process of removing and installing the sensor is quite accessible to any car enthusiast. Before screwing in the new sensor, you need to check the markings.

Experts recommend installing a new sensor with the same markings as the old one.

First you need to disconnect the wire with the protective cover from the sensor.

Using a wrench, unscrew the bolt and remove the sensor.

Install the new sensor in place.

After this, you should tighten it until it stops with a wrench.

Finally, you should start and stop the engine several times to check its operation and absence of malfunctions.

Replacing the sensor

The process of removing and installing the sensor is quite accessible to any car enthusiast. Before screwing in the new sensor, you need to check the markings.

Experts recommend installing a new sensor with the same markings as the old one.

First you need to disconnect the wire with the protective cover from the sensor.

Using a wrench, unscrew the bolt and remove the sensor.

Install the new sensor in place.

After this, you should tighten it until it stops with a wrench.

Finally, you should start and stop the engine several times to check its operation and absence of malfunctions.

What to do if the sensor lights up

If the oil pressure light on the dashboard comes on and does not go away for a long time, it can be assumed that there are problems with the engine. Sometimes this may be due to a loose wire.

There are several main reasons why the warning light on your dashboard comes on. These include:

installation of a low-quality oil filter. Low quality filters are not able to retain oil after the car is stopped. The solution is to replace the oil filter;
insufficient oil level. In this case, it is necessary to add oil to the required level and find the cause of the leak;
oil pump damage. It is recommended to have this problem repaired at a service station.

Thus, the oil pressure sensor on the VAZ-2109, despite its small size, plays a rather important role in ensuring the correct and stable operation of the car.

It requires constant monitoring and, if minimal signs of malfunction appear, mandatory replacement. This is the only way to extend the life of the engine of any car and avoid unnecessary financial costs that may arise due to sensor malfunctions.

What to do if the oil pressure sensor lights up

The light on the instrument panel is on - a clear sign of a malfunction. The causes of failure are varied. It is important to carry out a comprehensive diagnosis step by step.

The light does not go out for a long time: the engine oil level is below normal. Stop the engine and check the actual level with a dipstick. Add the missing amount. Do not exceed the maximum level mark.
The indicator lights up periodically when the car is stationary: the car is installed “at an angle”, which is why the DDM detects a lack of fluid.
Driving alarm indication: fluid level is below average. Add oil above the average level.
The indicator lights up for at least 15 - 20 seconds after starting the engine: a similar sign is typical after changing the oil when starting the engine for the first time.
The indicator is constantly on: the sensor has failed due to a short circuit in the on-board circuit. Use a multimeter to check the integrity of the on-board circuit.

The manufacturer's recommended oil pressure is 0.6 kgf/cm2 at 850 - 950 rpm idling.

Sources used:

https://vaz-russia.com/remont-vaz-2108/zamena-datchika-davleniya-masla-na-vaz-2108-vaz-2109-vaz-21099.html
https://zapchasti.expert/datchiki/datchik-davleniya-masla/datchik-davleniya-masla-vaz-2109.html
https://expertvaz.ru/2109/datchik-davleniya-masla-neispravnosti.html
https://zapchasti.expert/datchiki/datchik-davleniya-masla/datchik-davleniya-masla-vaz-2108.html