How to Check Oil Pressure With Obd2

If your car is displaying a check engine light or running rough, it could be due to low oil pressure. You can check your oil pressure with an OBD2 scanner. This will tell you if the oil pressure is within the normal range or if it’s too low.

To knowing How to Check Oil Pressure With Obd2 just follow the instruction which are mention in below.

How to Check Oil Pressure With Obd2 Scanner Tool- Step by Step

To check oil pressure using an OBD2 scanner tool, you would need additional specialized equipment, including an aftermarket oil pressure sensor and gauge, along with an OBD2 scanner that can read custom sensor data.

Here’s a general overview of how you can check oil pressure using this approach:

  1. Gather the Required Equipment:
    • OBD2 scanner that can read custom sensor data (consult the scanner’s manual or manufacturer for compatibility).
    • Aftermarket oil pressure sensor and gauge kit.
    • Necessary tools for installation, including wrenches and adapters.
  2. Prepare the Vehicle:
    • Park the vehicle on a level surface.
    • Ensure the engine is turned off and cool.
  3. Locate the Oil Pressure Port:
    • Identify the location on your engine block where you will install the aftermarket oil pressure sensor. This typically involves replacing the factory oil pressure sensor with the aftermarket one.
  4. Install the Aftermarket Oil Pressure Sensor:
    • Follow the manufacturer’s instructions to install the aftermarket oil pressure sensor. This usually involves removing the existing sensor and attaching the new sensor using the appropriate adapters and fittings.
  5. Connect the Oil Pressure Gauge:
    • Attach the oil pressure gauge from your aftermarket kit to the new sensor.
  6. Connect the OBD2 Scanner:
    • Connect your OBD2 scanner to the vehicle’s OBD2 port, usually located beneath the dashboard near the driver’s seat.
  7. Access Custom Sensor Data:
    • Use the OBD2 scanner to access custom sensor data. This feature may vary depending on your scanner’s make and model. Consult the scanner’s manual or manufacturer for guidance on accessing custom sensor data.
  8. Monitor Oil Pressure:
    • Look for the oil pressure reading on the OBD2 scanner. It should display the real-time oil pressure data obtained from the aftermarket sensor and gauge.
  9. Record the Reading:
    • Note the oil pressure reading and ensure it falls within the recommended range for your specific engine.
  10. Disconnect and Reassemble:
    • After obtaining the reading, disconnect the oil pressure gauge and OBD2 scanner.
    • Reassemble any components or panels that you removed during the installation process.
  11. Start the Engine:
    • Start the engine and verify that the oil pressure reading remains within the recommended range.

Keep in mind that this process involves more equipment and installation steps compared to using a dedicated oil pressure gauge. If you’re not comfortable with this level of installation and calibration, it’s advisable to seek assistance from a professional mechanic or automotive technician.

Additionally, consult the manuals and instructions provided with your specific OBD2 scanner and aftermarket oil pressure kit for detailed guidance.

How to Check Oil Pressure Without Gauge

Checking oil pressure without a gauge can be challenging because you won’t have a precise measurement. However, you can perform a basic visual and auditory inspection to get a rough idea of your oil pressure.

Here’s how to do it:

  1. Engine and Vehicle Preparation:
    • Park your vehicle on a level surface.
    • Ensure the engine is turned off and has cooled down to prevent burns or injuries.
  2. Inspect the Oil Warning Light:
    • Many modern vehicles have an oil pressure warning light on the instrument cluster. When you turn the ignition key to the “On” position (without starting the engine), this warning light should illuminate briefly and then turn off. If the light doesn’t come on at all, it might indicate a problem with the sensor or wiring.
  3. Start the Engine:
    • Start the engine and listen for any unusual noises, such as knocking or ticking. These noises may suggest low oil pressure.
  4. Observe the Oil Warning Light While Idling:
    • While the engine is idling, pay attention to the oil pressure warning light on the instrument cluster. If the light remains off or turns on briefly and then goes off, it’s an indication that you have at least some oil pressure.
    • However, it doesn’t provide a precise measurement.
  5. Rev the Engine:
    • Gently rev the engine by increasing the RPM slightly (do not over-rev). Observe whether the oil pressure warning light flickers, remains off, or stays on. A flickering or staying-on warning light might suggest an issue with oil pressure.
  6. Check for Oil Leaks:
    • Visually inspect the engine and the area beneath the vehicle for any signs of oil leaks. Oil spots or puddles under the vehicle can indicate an oil leak and potentially low oil levels.
  7. Listen for Engine Noises:
    • Pay attention to any unusual engine noises, such as knocking, ticking, or clattering. These noises can be indicative of insufficient oil pressure reaching critical engine components.
  8. Shut Off the Engine:
    • Turn off the engine and wait for a few minutes to allow the oil to settle.
  9. Check the Oil Level:
    • Use the dipstick to check the engine oil level. Ensure it’s within the recommended range. If the oil level is extremely low, it can lead to low oil pressure.
  10. Consider Professional Inspection:
    • If you suspect low oil pressure or have observed concerning symptoms, it’s advisable to have a professional mechanic perform a more accurate oil pressure test using specialized equipment.

Remember that this visual and auditory inspection method provides only a rough indication of your oil pressure. For a precise measurement of oil pressure, especially if you suspect a problem, it’s best to use a dedicated oil pressure gauge or seek the assistance of a qualified mechanic.

Low oil pressure can lead to serious engine damage, so it’s important to address any issues promptly.

How to Check Oil Pressure With Obd2


What Should My Oil Pressure Be Reading Psi?

If your car is running properly, your oil pressure should read between 20 and 40 PSI. If it’s reading below 20 PSI, that means your oil is low and needs to be refilled. If it’s reading above 40 PSI, that means your oil is too thick and needs to be thinned out.

Can You Use a Compression Tester for Oil Pressure?

No, you cannot use a compression tester for oil pressure. A compression tester is designed to test the amount of pressure that can be exerted on a piston in order to determine if there is enough force to push it down. Oil pressure is not related to the amount of pressure that can be exerted on a piston.

How Do You Know If You Have Low Oil Pressure?

If your engine suddenly starts making a loud knocking noise, it could be a sign that you have low oil pressure. Another way to tell is if your vehicle’s oil light comes on while you’re driving. This means that the oil pressure in your engine is getting too low and needs to be checked.

If you think you might have low oil pressure, it’s important to take your car to a mechanic as soon as possible so they can check it out. If the problem isn’t fixed, it could lead to serious damage to your engine.


Learning how to check oil pressure with OBD2 is a valuable skill for any vehicle owner or mechanic. OBD2 technology has revolutionized the way we diagnose and monitor our vehicles, providing access to a wealth of data that can help us keep our engines running smoothly and prevent costly damage.

By following the steps outlined in this process, one can easily use an OBD2 scanner to check oil pressure, ensuring that the engine is properly lubricated and protected from potential harm. Regular oil pressure monitoring not only extends the life of the engine but also enhances overall safety on the road.

As technology continues to advance, OBD2 scanners will remain an indispensable tool in the world of automotive maintenance and diagnostics, empowering individuals to take better care of their vehicles and enjoy a more reliable and efficient driving experience.