Oil pressure in the engine system is quite an important indicator. Some car owners prefer not to pay attention to it, which is absolutely incorrect, since if the oil pressure sensor works incorrectly, control over the pressure level becomes impossible. And with an overly low or high pressure of the oil in the engine system, the motor may fail in the next time.

Oil pressure sensor, if it works incorrectly, as it affects the machine

We all know that the main purpose of the oil system is the supply of oil on all surfaces and driving parts of the motor, thus forming a certain pressure supported by special mechanisms. It affects the decrease in the wear of the elements and provides a long service life of engine parts. With the help of oil pillow and lubrication, the parts are lubricated completely and do not overheat. Therefore, under the pressure of the oil, it is necessary to monitor very strictly, and when the breakdown is detected, you should urgently eliminate the malfunction. Otherwise, the engine is either its individual parts can fail.

As a rule, the oil level is measured by a special probe, which is marked with a minimum and maximum level. He is able to accurately show what level of oil is now and how much it still needs to be addressed to the optimal level.

With oil pressure, everything is much more difficult. It can be measured only with the help of a special pressure sensor, on another referred to as the DDM, which is used to avoid faults and shows the oil pressure level in the motor. Undoubtedly, like all the details, this sensor is able to come into disrepair over time.

Types of oil pressure sensors

As a rule, there are two types of oil pressure sensors - digital and analog. They both perform the same feature and necessary on the dashboard. However, the digital type sensor is considered much more efficient, since the electronics can show more accurate data.

Oil pressure sensor, operation principle

Since the pressure change occurs, naturally, the sensor must signal about it, for which the membrane sensitive pressure is located inside it. When the driver turns on the ignition, the low pressure indicator lights up on the dashboard. In about ten seconds, it goes out, which indicates the formation of pressure in the oil system. If there is no pressure, the membrane does not press the pusher, which, accordingly, presses the contacts, and those, in turn, are closed, resulting in the indicator. When the pressure is formed, the membrane begins, after which contacts are blocked. Thus, this mechanism reacts even to the weakest pressure fluctuations.

Tools assistants and devices when working

To check the electronic sensor, you will need such devices:

1. Manometer.
2. Pump.
3. Multimeter.

To check the mechanical type sensor, you will need the following devices:

1. The sensor located on the dashboard.
2. Pump.
   
3. The hose of the same diameter with the outlet holes of the oil sensor.

How to check the electronic type sensor, step-by-step instruction

While working with a multimeter, check that it worked properly, without the slightest errors, and was charged. Otherwise, readings may be unturid.

1. First of all, it is necessary to remove the sensor from the motor, as it is not possible to produce this event in another (sensor check) is impossible.
   
2. Next, connect the multimeter to the sensor contacts and switch it to the wire cliff check mode.
3. Then connect the pressure gauge and begin to pump pressure. The sensor should indicate the maximum and minimum allowable pressure. If you pumped the minimum pressure and the multimeter shows a closed circuit, then the sensor is working. However, if after a number of attempts, the multimeter did not give indications, most likely, the sensor is not suitable.
   

When checking, pay attention to contacts. If there is no good contact between the terminals, in any case, including with a good sensor, the readings will be absent.

How to check the mechanical type sensor, step by step instructions

The principle of operation of the mechanical pressure sensor is rather simple. The housing is the slider, which moves along the nichrome winding. Depending on the pressure, the resistance is changed on the sensor. The membrane moves and, therefore, makes the slider move. Taking into account such resistance, the pointer on the dashboard sensor shows the corresponding pressure.

To check, you need to take one end of the hose and connect it to the pump, and the second end to the sensor. On the other hand, connect the sensor, which will show the pressure result. It is extremely important that all compounds are hermetic. Otherwise, nothing will happen.

Next, we pumped up the pressure, while making the note on the sheet of paper, where it is necessary to apply resistance in parallel. Some car enthusiasts instead of the pump prefer to connect the spare parts of the vehicle, pre-pumped it to the maximum. As a result - you will see the entire testing scales at once.

Tips of professionals

If you find that the sensor is faulty, you do not need to panic. However, it is not worth tightening with its replacement. Repair the oil pressure sensor is needed on a cold motor, because during the engine operation, the oil is heated in it. As a result, you can get injuries or burns. As a rule, when the sensor is replaced, most motorists produce immediately and replace the oil. It is desirable to replace the oil filter.