Oil pressure sensor - how to check the oil level in the car? Symptoms of sensor malfunction and damage

A sudden drop in oil pressure can only portend one thing - a leak in the oil pan. However, this is not the only situation when the oil pressure sensor makes itself felt. Sometimes the failure is less serious, but still requires intervention. Failure to do so may result in permanent engine damage. How to check the health of the oil pressure sensor? We will answer this question and many others in our article. To learn more!

Oil pressure sensor - principle of operation and design

What is this little diagnostic device? The oil pressure sensor is usually a thread screwed into a corresponding socket in the cylinder block. It can be located next to the oil pan or next to the oil filter. In the upper part there is a socket or place for screwing a cable with a plate at the end.

How does the oil pressure sensor work?

The simplicity of this element is due to the function it performs. Its role is to read the oil pressure in the engine. When the ignition is switched on, an electrical impulse is generated. This pulse allows you to measure the pressure value. The signal is constantly sent to the control unit and displayed on the dashboard. Very often, the oil pressure sensor makes itself felt when it fails or gives alarming values.

Find out why it's worth knowing how an oil pressure sensor works

You already know how this little device works. So you can guess at what moments the equipment should turn on. When you turn the key in the ignition, the first thing you see is the oil level indicator. This is normal and the result of a diagnostic procedure. After a while, the icon will turn off. However, in the case of low oil pressure, this will make itself felt. If this happens, it means that there is little lubrication, which has a huge impact on the correct operation of the engine.

Oil pressure sensor - signs of damage

What to do if the sensor itself is damaged? During ignition, the sensor will not light up on the console. This means that the diagnostic process was not performed correctly. We may pay a heavy price for ignoring this vulnerability for a long time. In practice, this is usually a sign of damage to the device itself. When the oil pressure gauge icon appears on the dashboard, it can portend two problems:

• too low oil level;
• excessive oil loss.

What can you do to make sure what problem you are dealing with?

What should I do if the oil pressure indicator light comes on?

When the oil level is too low, the oil pressure warning light will only come on at idle and low range. When you bring the engine up to a high speed, the crank-piston system will increase the oil pressure and the indicator will turn off. This usually means low lubrication. If you notice this in your vehicle, stop the vehicle and inspect the engine. You may find that you have minor leaks. Also, after waiting a few minutes, check the oil level and top up if necessary.

How does the oil pressure sensor report a serious malfunction?

However, if the oil pressure sensor beeps constantly and regardless of engine speed, this indicates a serious leak. Often in such a situation, an additional message appears on the need to immediately stop the car and turn off the drive. Do not underestimate this recommendation.

How to check if the oil pressure sensor is working?

The matter is very simple - the absence of a light bulb on the dashboard during ignition should alert you. This is the first signal that something is wrong with the sensor. If you have the ability to monitor pressure, for example through diagnostic equipment, then a faulty oil pressure sensor will send very strange values. Normally, they should be between 2 and 4 bar on an engine running at 2000 rpm. The recommended pressure range is written on the sensor itself.

A mechanic can check the pressure using a special pressure gauge that is screwed in instead of a gauge.

Why is driving with low oil dangerous?

The consequences of violations in the lubrication system can be catastrophic. Too high an oil level can cause it to ignite in the combustion chamber. On the other hand, too low a value indicated by the oil pressure sensor can lead to engine seizure. In some cases, cylinder walls or connecting rod bearings may be damaged. Complete seizure of the unit usually results in its replacement.

As you can see, the oil pressure sensor gives clear signals of problems and should not be underestimated. Warning pressure values ​​should encourage you to visit a specialist. Ignoring problems can be disastrous for your engine.