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Oil pressure sensor: how it works, failure symptoms, and replacement cost

You most likely have heard of an oil pressure sensor (also known as an oil pressure switch), but do you also know how it works and what it does? Here we’ll go into more detail about this component and how to detect if it’s malfunctioning.

What is an oil pressure sensor and what does it do?

A car engine oil pressure sensor is an electronic component that is responsible for monitoring the oil pressure in a vehicle's engine. It is typically located in the engine block or oil pump and works by sensing the pressure of the oil as it circulates through the engine. It sends a signal to the vehicle's engine control module (ECM) or oil pressure gauge to let the driver know when the oil pressure is too low. If the oil pressure drops below a certain level, it can cause serious engine damage or failure, so it is important that it functions properly. In addition to sending signals to the ECM or gauge, some modern oil pressure sensors can also communicate with other vehicle systems, such as the transmission or fuel injection system, to help ensure optimal engine performance and efficiency. Overall, the sensor plays a critical role in keeping a vehicle's engine running smoothly and preventing potential damage or failure.

oil pressure sensor

How can you tell your oil pressure sensor/switch is bad?

There are a few common signs that may let you know that your oil pressure sensor/switch is faulty, these include but are not limited to:

  1. The low-pressure warning light turns on, letting you know that the pressure is too low.
  2. The gauge gives erratic or inaccurate readings, such as showing high pressure while the engine is idling, or indicating low pressure when your engine is running high at high RPMs.
  3. In some cases a faulty sensor can trigger the engine warning light on the dashboard.
  4. The engine may make unusual noises, such as knocking or ticking due to a lack of car engine oil.

If the oil pressure switch isn’t working and fails to detect low pressure, it can lead to damage to the engine or even complete engine failure which will be very costly to repair. Therefore, it is important to have your vehicle inspected as soon as possible to determine the cause and prevent possible damage to your engine.

faulty oil pressure sensor symptoms

Leaking sensor?

Firstly, make sure that it is actually leaking and not just dirty or wet from a previous spill. If you find that it is leaking, check to see if it needs to be tightened but be careful not to over-tighten it. If this does not solve the issue, you may need to get a replacement. You can check online for many types, such as an oil pressure sensor for the Peugeot 207. Once you have installed the new sensor, start the engine and check the oil pressure gauge to ensure that it is working properly.

How much does a replacement cost?

The price of a new oil pressure sensor/switch can vary depending on the make and model of your car. It is an inexpensive part and the price starts at around £3.50. If you are in the market for this component, make sure that it is compatible with your car and that you get a high-quality replacement. The sensor should be accurate and provide reliable readings of the oil pressure. Check the specifications to ensure that it meets the required accuracy levels. While price is always a consideration, it is important not to sacrifice quality for a lower price. Choose a sensor that is reasonably priced but still meets your quality and compatibility requirements. By considering these factors when buying a new sensor, you can ensure that you get a high-quality replacement that will provide accurate readings and last for a long time.

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