How to Use a OBD II Scanner: Master Car Diagnostics – Automotivio

How to Use a OBD II Scanner: Master Car Diagnostics

To use an OBD-II scanner, plug the device into the OBD port located under your vehicle’s steering column, turn on the ignition, and follow the instructions on the screen. However, it’s important to note that an OBD-II scanner is a simplified version of a scan tool and can’t perform more complex functions.

Steps To Use An Obd Ii Scanner

Locate the OBD II port in your vehicle. It is usually located under the steering column, but it can vary depending on the make and model of your car. Refer to your car’s manual for specific instructions on where to find the port.

Once you have located the OBD II port, plug the scanner into the port. Ensure that the scanner is securely connected and properly inserted.

Turn on the ignition without starting the engine. This will power up the scanner and allow it to communicate with your vehicle’s onboard computer.

Once the scanner is powered on, it will start reading and displaying the diagnostic codes stored in your vehicle’s computer system. Take note of these codes as they will provide information about any issues or malfunctions in your car.

After obtaining the diagnostic codes, you will need to interpret them to understand the specific problem areas in your vehicle. Consult the scanner’s manual or an online resource to decipher the codes.

If you have successfully resolved the issues in your vehicle, you can clear the diagnostic codes using the scanner. This will reset the check engine light and ensure that the problem has been resolved.

How to Use a OBD II Scanner: Master the Art of Car DiagnosticsCredit:


Common Issues And Troubleshooting

When using an OBD II scanner, you may encounter some common issues and troubleshooting steps:

  • Intermittent Connection: One common issue is an intermittent connection between the scanner and the OBD II port. This can be caused by loose or corroded connections. Make sure the connection is secure and clean to ensure a reliable connection.
  • Scanner Not Powering On If your scanner is not powering on, check the battery or power source. It could be a simple issue of a drained battery or a loose power cable. Ensure that the scanner is properly connected to a power source.
  • Error Codes Not Clearing: Sometimes, error codes may not clear even after troubleshooting. In such cases, you can try disconnecting the battery for a few minutes to reset the system. Remember to follow the proper safety procedures when disconnecting the battery.
  • Lack of Diagnostic Information: If your OBD II scanner is not providing enough diagnostic information, it could be due to compatibility issues with your vehicle. Make sure your scanner is compatible with your car’s make and model, and consider updating the scanner’s software if necessary.
  • Compatibility Issues: Lastly, compatibility issues between the scanner and your car’s onboard system can occur. Ensure that your scanner is designed to work with your car’s OBD II protocol, which can vary depending on the vehicle’s make and model.

Frequently Asked Questions 

How Do I Use My Obd2 Scanner?

To use an OBD2 scanner, first, plug it into the OBD port of your vehicle. Then, power up the scanner and scan the vehicle. Navigate through the main menu to understand trouble codes. You can also use OBD2 apps to read and clear codes.

What Is The Difference Between An Obd2 Reader And An Obd2 Scanner?

An OBD2 reader is a simplified scan tool that plugs into a vehicle’s OBD2 port. It can’t perform as many functions as a scanner.

Do You Turn the Car On When Using Obd2 Scanner?

Yes, you need to turn on the car when using an OBD2 scanner.

Is It Okay To Leave An Obd-ii Scanner On A Car?

Leaving an OBD-II scanner plugged into the car is generally safe. However, it is recommended to unplug it when not in use to prevent draining the car battery.


Using an OBD II scanner is a simple and effective way to diagnose any issues with your vehicle. By plugging the scanner into your vehicle’s OBD-II port, you can easily read and interpret diagnostic trouble codes. This allows you to identify the specific problem and take the necessary steps to fix it.

Whether you’re a professional mechanic or a car owner looking to save time and money on repairs, learning how to use an OBD 2 scanner is a valuable skill to have. So, start exploring the world of automotive diagnostics and take control of your vehicle’s health today!

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